./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 22:28:24,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 22:28:24,514 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 22:28:24,520 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 22:28:24,520 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 22:28:24,520 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 22:28:24,521 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 22:28:24,522 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 22:28:24,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 22:28:24,523 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 22:28:24,524 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 22:28:24,524 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 22:28:24,524 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 22:28:24,525 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 22:28:24,525 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 22:28:24,525 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 22:28:24,526 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 22:28:24,527 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 22:28:24,527 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 22:28:24,528 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 22:28:24,529 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 22:28:24,529 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 22:28:24,530 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 22:28:24,530 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 22:28:24,531 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 22:28:24,531 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 22:28:24,531 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 22:28:24,532 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 22:28:24,532 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 22:28:24,533 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 22:28:24,533 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 22:28:24,533 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 22:28:24,533 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 22:28:24,533 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 22:28:24,534 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 22:28:24,534 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 22:28:24,534 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-12-08 22:28:24,542 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 22:28:24,542 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 22:28:24,542 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 22:28:24,542 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 22:28:24,543 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-08 22:28:24,543 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 22:28:24,543 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 22:28:24,544 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-08 22:28:24,544 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 22:28:24,545 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 22:28:24,545 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-08 22:28:24,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 22:28:24,545 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 22:28:24,545 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-08 22:28:24,545 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-08 22:28:24,545 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_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2018-12-08 22:28:24,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 22:28:24,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 22:28:24,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 22:28:24,571 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 22:28:24,571 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 22:28:24,571 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-12-08 22:28:24,605 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/data/6e51e2e97/a05fbe309aa24d53915685998c0d8884/FLAG274f110ab [2018-12-08 22:28:24,996 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 22:28:24,997 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-12-08 22:28:25,000 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/data/6e51e2e97/a05fbe309aa24d53915685998c0d8884/FLAG274f110ab [2018-12-08 22:28:25,009 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/data/6e51e2e97/a05fbe309aa24d53915685998c0d8884 [2018-12-08 22:28:25,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 22:28:25,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 22:28:25,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 22:28:25,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 22:28:25,015 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 22:28:25,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59facd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25, skipping insertion in model container [2018-12-08 22:28:25,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 22:28:25,030 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 22:28:25,121 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 22:28:25,124 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 22:28:25,133 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 22:28:25,140 INFO L195 MainTranslator]: Completed translation [2018-12-08 22:28:25,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25 WrapperNode [2018-12-08 22:28:25,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 22:28:25,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 22:28:25,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 22:28:25,141 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 22:28:25,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 22:28:25,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 22:28:25,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 22:28:25,160 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 22:28:25,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... [2018-12-08 22:28:25,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 22:28:25,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 22:28:25,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 22:28:25,170 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 22:28:25,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 22:28:25,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 22:28:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-08 22:28:25,232 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-08 22:28:25,305 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 22:28:25,305 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-08 22:28:25,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 10:28:25 BoogieIcfgContainer [2018-12-08 22:28:25,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 22:28:25,306 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-08 22:28:25,306 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-08 22:28:25,308 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-08 22:28:25,308 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-08 22:28:25,309 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 08.12 10:28:25" (1/3) ... [2018-12-08 22:28:25,309 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4d5c87c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 08.12 10:28:25, skipping insertion in model container [2018-12-08 22:28:25,309 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-08 22:28:25,309 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:28:25" (2/3) ... [2018-12-08 22:28:25,310 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4d5c87c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 08.12 10:28:25, skipping insertion in model container [2018-12-08 22:28:25,310 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-08 22:28:25,310 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 10:28:25" (3/3) ... [2018-12-08 22:28:25,311 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_7_false-unreach-call_true-termination.c [2018-12-08 22:28:25,343 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 22:28:25,344 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-08 22:28:25,344 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-08 22:28:25,344 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-08 22:28:25,344 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 22:28:25,344 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 22:28:25,344 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-08 22:28:25,344 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 22:28:25,344 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-08 22:28:25,353 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-12-08 22:28:25,368 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-08 22:28:25,369 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:25,369 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:25,374 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-08 22:28:25,374 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 22:28:25,374 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-08 22:28:25,374 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-12-08 22:28:25,375 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-08 22:28:25,375 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:25,375 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:25,375 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-08 22:28:25,375 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 22:28:25,380 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-12-08 22:28:25,380 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2018-12-08 22:28:25,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-12-08 22:28:25,385 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:25,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:25,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:25,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:25,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-12-08 22:28:25,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:25,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:25,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:25,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:25,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-12-08 22:28:25,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:25,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:25,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:25,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:25,513 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:25,514 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:25,514 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:25,514 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:25,514 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 22:28:25,514 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:25,514 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:25,514 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:25,514 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-12-08 22:28:25,514 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:25,515 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:25,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,533 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,587 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:25,587 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:25,591 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:25,591 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:25,597 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:25,598 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:25,613 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:25,613 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:25,615 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:25,616 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:25,639 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:25,639 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:25,641 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:25,641 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:25,656 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:25,657 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:25,659 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:25,659 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:25,675 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:25,675 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:25,691 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 22:28:25,692 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:25,707 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 22:28:25,708 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:25,708 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:25,709 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:25,709 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:25,709 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 22:28:25,709 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:25,709 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:25,709 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:25,709 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-12-08 22:28:25,709 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:25,709 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:25,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:25,741 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:25,744 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 22:28:25,745 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 [2018-12-08 22:28:25,746 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:25,746 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:25,746 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:25,747 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:25,747 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:25,748 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:25,748 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:25,750 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:25,751 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 [2018-12-08 22:28:25,751 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:25,751 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:25,752 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:25,752 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:25,752 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:25,752 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:25,752 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:25,753 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:25,753 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 [2018-12-08 22:28:25,754 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:25,754 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:25,754 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:25,754 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:25,754 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:25,755 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:25,755 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:25,756 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:25,756 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 [2018-12-08 22:28:25,756 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:25,756 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:25,756 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:25,757 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:25,757 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:25,757 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:25,757 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:25,758 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:25,758 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 22:28:25,758 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:25,759 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:25,759 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:25,759 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:25,759 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:25,759 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:25,759 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:25,763 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 22:28:25,765 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 22:28:25,765 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 22:28:25,766 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 22:28:25,766 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 22:28:25,767 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 22:28:25,767 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-12-08 22:28:25,768 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 22:28:25,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:25,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:25,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:25,835 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 [2018-12-08 22:28:25,836 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-12-08 22:28:25,900 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2018-12-08 22:28:25,901 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 [2018-12-08 22:28:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-08 22:28:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-08 22:28:25,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-12-08 22:28:25,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:25,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-12-08 22:28:25,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:25,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-12-08 22:28:25,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:25,905 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-12-08 22:28:25,908 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-08 22:28:25,912 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-12-08 22:28:25,912 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-12-08 22:28:25,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-12-08 22:28:25,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-12-08 22:28:25,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:25,914 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-12-08 22:28:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-12-08 22:28:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-12-08 22:28:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-08 22:28:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-12-08 22:28:25,931 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-08 22:28:25,931 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-08 22:28:25,931 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-08 22:28:25,931 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-12-08 22:28:25,932 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-08 22:28:25,932 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:25,932 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:25,932 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:25,932 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:25,933 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-12-08 22:28:25,933 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2018-12-08 22:28:25,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-12-08 22:28:25,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:25,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:25,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:25,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 22:28:25,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 22:28:25,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 22:28:25,977 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 22:28:25,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-12-08 22:28:25,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:25,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:25,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:25,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 22:28:26,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 22:28:26,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 22:28:26,005 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-08 22:28:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 22:28:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 22:28:26,008 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-12-08 22:28:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 22:28:26,055 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-12-08 22:28:26,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 22:28:26,056 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-12-08 22:28:26,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-08 22:28:26,058 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-12-08 22:28:26,058 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-12-08 22:28:26,058 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-12-08 22:28:26,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-12-08 22:28:26,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:26,059 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-08 22:28:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-12-08 22:28:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-08 22:28:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 22:28:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-12-08 22:28:26,062 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-08 22:28:26,062 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-08 22:28:26,062 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-08 22:28:26,062 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-12-08 22:28:26,063 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-08 22:28:26,063 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:26,063 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:26,064 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:26,064 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:26,064 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-12-08 22:28:26,064 INFO L796 eck$LassoCheckResult]: Loop: 182#L11-1 call #t~ret1 := fibo(~n - 2);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume !(1 == ~n); 193#L11 call #t~ret0 := fibo(~n - 1);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume 1 == ~n;#res := 1; 199#fiboFINAL assume true; 197#fiboEXIT >#32#return; 182#L11-1 [2018-12-08 22:28:26,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-12-08 22:28:26,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:26,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:26,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:26,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:26,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:26,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 22:28:26,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:26,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:26,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:26,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 22:28:26,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-08 22:28:26,138 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 22:28:26,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-12-08 22:28:26,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:26,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:26,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:26,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:26,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:26,205 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:26,205 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:26,205 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:26,205 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:26,205 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 22:28:26,206 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:26,206 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:26,206 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:26,206 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-12-08 22:28:26,206 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:26,206 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:26,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,239 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:26,239 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:26,248 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:26,248 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:26,265 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 22:28:26,265 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:26,752 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 22:28:26,753 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:26,753 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:26,753 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:26,753 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:26,753 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 22:28:26,754 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:26,754 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:26,754 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:26,754 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-12-08 22:28:26,754 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:26,754 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:26,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:26,801 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:26,801 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 22:28:26,802 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 [2018-12-08 22:28:26,802 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:26,802 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:26,802 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:26,802 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:26,803 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:26,803 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:26,803 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:26,805 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:26,805 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 [2018-12-08 22:28:26,806 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:26,806 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:26,806 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:26,806 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:26,806 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:26,806 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:26,807 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:26,811 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 22:28:26,814 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 22:28:26,814 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 22:28:26,815 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 22:28:26,815 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 22:28:26,815 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 22:28:26,815 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-08 22:28:26,815 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 22:28:26,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:26,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:26,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:26,898 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 [2018-12-08 22:28:26,898 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-12-08 22:28:26,994 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2018-12-08 22:28:26,994 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 [2018-12-08 22:28:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 22:28:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-12-08 22:28:26,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-12-08 22:28:26,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:26,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-12-08 22:28:26,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:26,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-12-08 22:28:26,996 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:26,996 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-12-08 22:28:26,999 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-08 22:28:27,001 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-12-08 22:28:27,001 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-12-08 22:28:27,002 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-12-08 22:28:27,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-12-08 22:28:27,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:27,002 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-12-08 22:28:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-12-08 22:28:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-12-08 22:28:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-08 22:28:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-12-08 22:28:27,009 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-12-08 22:28:27,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 22:28:27,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-08 22:28:27,009 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-12-08 22:28:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 22:28:27,060 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-12-08 22:28:27,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 22:28:27,061 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-12-08 22:28:27,063 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-08 22:28:27,064 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-12-08 22:28:27,064 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-12-08 22:28:27,064 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-12-08 22:28:27,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-12-08 22:28:27,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:27,065 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-12-08 22:28:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-12-08 22:28:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-12-08 22:28:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-08 22:28:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-12-08 22:28:27,070 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-12-08 22:28:27,071 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-12-08 22:28:27,071 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-08 22:28:27,071 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-12-08 22:28:27,072 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-08 22:28:27,072 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:27,072 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:27,073 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:27,073 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:27,073 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-12-08 22:28:27,073 INFO L796 eck$LassoCheckResult]: Loop: 760#L11-1 call #t~ret1 := fibo(~n - 2);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume !(1 == ~n); 763#L11 call #t~ret0 := fibo(~n - 1);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume 1 == ~n;#res := 1; 769#fiboFINAL assume true; 770#fiboEXIT >#32#return; 760#L11-1 [2018-12-08 22:28:27,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-12-08 22:28:27,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:27,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:27,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 22:28:27,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 22:28:27,141 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:27,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:27,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 22:28:27,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 22:28:27,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-08 22:28:27,181 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 22:28:27,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-12-08 22:28:27,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:27,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:27,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:27,237 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:27,237 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:27,238 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:27,238 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:27,238 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 22:28:27,238 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:27,238 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:27,238 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:27,238 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-12-08 22:28:27,238 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:27,238 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:27,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,265 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:27,265 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:27,267 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:27,267 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:27,283 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 22:28:27,284 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:27,767 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 22:28:27,768 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:27,769 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:27,769 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:27,769 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:27,769 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 22:28:27,769 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:27,769 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:27,769 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:27,769 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-12-08 22:28:27,769 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:27,769 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:27,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:27,798 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:27,798 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 22:28:27,798 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 22:28:27,799 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:27,799 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:27,799 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:27,799 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:27,799 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:27,799 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:27,799 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:27,800 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:27,800 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 [2018-12-08 22:28:27,800 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:27,800 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:27,801 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:27,801 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:27,801 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:27,801 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:27,801 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:27,801 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:27,802 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 [2018-12-08 22:28:27,802 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:27,802 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:27,802 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:27,802 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:27,802 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:27,803 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:27,803 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:27,804 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:27,804 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 [2018-12-08 22:28:27,804 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:27,804 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:27,804 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:27,804 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:27,804 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:27,805 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:27,805 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:27,807 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 22:28:27,809 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 22:28:27,809 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 22:28:27,809 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 22:28:27,809 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 22:28:27,809 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 22:28:27,809 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-08 22:28:27,809 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 22:28:27,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:27,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:27,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:27,879 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 [2018-12-08 22:28:27,879 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-08 22:28:27,959 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 162 states and 216 transitions. Complement of second has 25 states. [2018-12-08 22:28:27,959 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 [2018-12-08 22:28:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 22:28:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-12-08 22:28:27,960 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-08 22:28:27,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:27,960 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:27,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:27,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:28,028 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 [2018-12-08 22:28:28,028 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-08 22:28:28,099 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 287 states and 386 transitions. Complement of second has 25 states. [2018-12-08 22:28:28,099 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 [2018-12-08 22:28:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 22:28:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-12-08 22:28:28,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-08 22:28:28,100 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:28,100 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:28,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:28,168 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 [2018-12-08 22:28:28,168 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-08 22:28:28,279 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 825 states and 1090 transitions. Complement of second has 112 states. [2018-12-08 22:28:28,279 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 [2018-12-08 22:28:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-08 22:28:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-12-08 22:28:28,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-08 22:28:28,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:28,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-12-08 22:28:28,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:28,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-12-08 22:28:28,281 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:28,281 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-12-08 22:28:28,287 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-12-08 22:28:28,292 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-12-08 22:28:28,293 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-12-08 22:28:28,293 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-12-08 22:28:28,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-12-08 22:28:28,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:28,293 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-12-08 22:28:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-12-08 22:28:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-12-08 22:28:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-12-08 22:28:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-12-08 22:28:28,310 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-12-08 22:28:28,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 22:28:28,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-12-08 22:28:28,310 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-12-08 22:28:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 22:28:28,433 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-12-08 22:28:28,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 22:28:28,434 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-12-08 22:28:28,439 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-12-08 22:28:28,447 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-12-08 22:28:28,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-12-08 22:28:28,448 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-12-08 22:28:28,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-12-08 22:28:28,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:28,448 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-12-08 22:28:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-12-08 22:28:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-12-08 22:28:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-12-08 22:28:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-12-08 22:28:28,471 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-12-08 22:28:28,471 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-12-08 22:28:28,471 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-08 22:28:28,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-12-08 22:28:28,473 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-12-08 22:28:28,473 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:28,473 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:28,474 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:28,474 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 22:28:28,474 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-12-08 22:28:28,474 INFO L796 eck$LassoCheckResult]: Loop: 3591#fiboENTRY ~n := #in~n; 3595#L6 assume !(~n < 1); 3615#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-12-08 22:28:28,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-12-08 22:28:28,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:28,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:28,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:28,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 22:28:28,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-12-08 22:28:28,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 22:28:28,522 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:28,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 22:28:28,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 22:28:28,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-12-08 22:28:28,639 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 22:28:28,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-12-08 22:28:28,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:28,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:28,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:28,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 22:28:28,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:28,670 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:28,670 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:28,670 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:28,670 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:28,670 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 22:28:28,670 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:28,670 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:28,670 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:28,670 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-12-08 22:28:28,670 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:28,670 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:28,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,695 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:28,696 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:28,698 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:28,698 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:28,700 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:28,700 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:28,715 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:28,715 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/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 [2018-12-08 22:28:28,737 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 22:28:28,737 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:28,753 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 22:28:28,755 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:28,755 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:28,755 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:28,755 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:28,755 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 22:28:28,755 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:28,755 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:28,755 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:28,755 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-12-08 22:28:28,756 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:28,756 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:28,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:28,799 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:28,799 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 22:28:28,799 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 22:28:28,799 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:28,799 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:28,799 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:28,800 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:28,800 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:28,800 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:28,800 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:28,801 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 22:28:28,803 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 22:28:28,803 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 22:28:28,803 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 22:28:28,804 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 22:28:28,804 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 22:28:28,804 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-12-08 22:28:28,804 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 22:28:28,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:28,885 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 [2018-12-08 22:28:28,885 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-12-08 22:28:28,922 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-12-08 22:28:28,923 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 [2018-12-08 22:28:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-08 22:28:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-12-08 22:28:28,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-08 22:28:28,924 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:28,924 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:28,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:28,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:28,976 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 [2018-12-08 22:28:28,976 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-12-08 22:28:29,011 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-12-08 22:28:29,012 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 [2018-12-08 22:28:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-08 22:28:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-12-08 22:28:29,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-08 22:28:29,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:29,012 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:29,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:29,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:29,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:29,064 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 [2018-12-08 22:28:29,064 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-12-08 22:28:29,110 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 494 states and 656 transitions. Complement of second has 14 states. [2018-12-08 22:28:29,110 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 [2018-12-08 22:28:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-08 22:28:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-12-08 22:28:29,111 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-08 22:28:29,111 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:29,111 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-12-08 22:28:29,111 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:29,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-12-08 22:28:29,112 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:29,112 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-12-08 22:28:29,117 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-12-08 22:28:29,122 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-12-08 22:28:29,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-12-08 22:28:29,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-12-08 22:28:29,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-12-08 22:28:29,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:29,122 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-12-08 22:28:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-12-08 22:28:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-12-08 22:28:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-12-08 22:28:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-12-08 22:28:29,135 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-12-08 22:28:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 22:28:29,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-12-08 22:28:29,136 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-12-08 22:28:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 22:28:29,269 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-12-08 22:28:29,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 22:28:29,269 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-12-08 22:28:29,271 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-08 22:28:29,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-12-08 22:28:29,273 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-12-08 22:28:29,273 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-12-08 22:28:29,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-12-08 22:28:29,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:29,273 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-12-08 22:28:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-12-08 22:28:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-12-08 22:28:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-12-08 22:28:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-12-08 22:28:29,278 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-12-08 22:28:29,278 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-12-08 22:28:29,278 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-08 22:28:29,278 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-12-08 22:28:29,279 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-08 22:28:29,279 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:29,279 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:29,280 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 22:28:29,280 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 22:28:29,280 INFO L794 eck$LassoCheckResult]: Stem: 6303#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 6304#L25 call main_#t~ret2 := fibo(main_~x~0);< 6333#fiboENTRY ~n := #in~n; 6400#L6 assume !(~n < 1); 6399#L8 assume !(1 == ~n); 6395#L11 call #t~ret0 := fibo(~n - 1);< 6398#fiboENTRY ~n := #in~n; 6397#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6390#L11 call #t~ret0 := fibo(~n - 1);< 6394#fiboENTRY ~n := #in~n; 6392#L6 assume !(~n < 1); 6393#L8 assume !(1 == ~n); 6323#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6384#L6 assume !(~n < 1); 6385#L8 assume 1 == ~n;#res := 1; 6497#fiboFINAL assume true; 6496#fiboEXIT >#32#return; 6298#L11-1 call #t~ret1 := fibo(~n - 2);< 6318#fiboENTRY ~n := #in~n; 6319#L6 assume ~n < 1;#res := 0; 6499#fiboFINAL assume true; 6297#fiboEXIT >#34#return; 6299#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 6471#fiboFINAL assume true; 6470#fiboEXIT >#32#return; 6330#L11-1 call #t~ret1 := fibo(~n - 2);< 6401#fiboENTRY ~n := #in~n; 6404#L6 assume !(~n < 1); 6484#L8 assume !(1 == ~n); 6306#L11 call #t~ret0 := fibo(~n - 1);< 6327#fiboENTRY ~n := #in~n; 6380#L6 assume !(~n < 1); 6370#L8 assume !(1 == ~n); 6352#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-12-08 22:28:29,280 INFO L796 eck$LassoCheckResult]: Loop: 6350#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-12-08 22:28:29,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-12-08 22:28:29,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:29,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:29,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:29,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 22:28:29,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-08 22:28:29,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 22:28:29,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 22:28:29,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 22:28:29,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 22:28:29,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 22:28:29,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 22:28:29,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 22:28:29,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-12-08 22:28:29,462 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 22:28:29,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-12-08 22:28:29,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:29,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:29,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 22:28:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:29,496 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:29,496 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:29,496 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:29,496 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:29,496 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 22:28:29,496 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:29,497 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:29,497 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:29,497 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-12-08 22:28:29,497 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:29,497 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:29,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:29,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:29,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:29,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:29,523 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:29,524 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:29,527 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:29,527 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:29,529 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:29,529 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:29,544 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:29,545 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:29,562 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 22:28:29,562 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:34,906 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 22:28:34,908 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:34,908 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:34,908 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:34,908 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:34,908 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 22:28:34,908 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:34,908 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:34,909 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:34,909 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-12-08 22:28:34,909 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:34,909 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:34,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:34,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:34,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:34,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:34,945 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:34,945 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 22:28:34,945 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-08 22:28:34,945 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:34,945 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:34,946 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:34,946 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:34,946 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:34,946 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:34,946 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:34,948 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 22:28:34,950 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 22:28:34,950 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 22:28:34,950 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 22:28:34,950 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 22:28:34,950 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 22:28:34,950 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-08 22:28:34,950 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 22:28:34,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:35,042 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-12-08 22:28:35,043 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-12-08 22:28:35,076 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 215 states and 273 transitions. Complement of second has 18 states. [2018-12-08 22:28:35,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-12-08 22:28:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-08 22:28:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-12-08 22:28:35,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-08 22:28:35,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:35,077 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:35,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:35,149 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-12-08 22:28:35,149 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-12-08 22:28:35,194 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 221 states and 279 transitions. Complement of second has 17 states. [2018-12-08 22:28:35,195 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 [2018-12-08 22:28:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-08 22:28:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-12-08 22:28:35,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-08 22:28:35,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:35,196 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:35,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:35,261 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-12-08 22:28:35,261 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-12-08 22:28:35,294 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 271 states and 343 transitions. Complement of second has 27 states. [2018-12-08 22:28:35,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-12-08 22:28:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-08 22:28:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-12-08 22:28:35,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-08 22:28:35,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:35,295 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-12-08 22:28:35,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:35,295 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-12-08 22:28:35,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:35,296 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-12-08 22:28:35,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-08 22:28:35,299 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-12-08 22:28:35,299 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-12-08 22:28:35,299 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-12-08 22:28:35,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-12-08 22:28:35,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:35,300 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-12-08 22:28:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-12-08 22:28:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-12-08 22:28:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-12-08 22:28:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-12-08 22:28:35,304 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-12-08 22:28:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-08 22:28:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-12-08 22:28:35,304 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-12-08 22:28:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 22:28:35,489 INFO L93 Difference]: Finished difference Result 344 states and 473 transitions. [2018-12-08 22:28:35,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 22:28:35,489 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 344 states and 473 transitions. [2018-12-08 22:28:35,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-08 22:28:35,495 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 344 states to 315 states and 437 transitions. [2018-12-08 22:28:35,495 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-12-08 22:28:35,496 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-12-08 22:28:35,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 437 transitions. [2018-12-08 22:28:35,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:35,496 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 437 transitions. [2018-12-08 22:28:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 437 transitions. [2018-12-08 22:28:35,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 270. [2018-12-08 22:28:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-12-08 22:28:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-12-08 22:28:35,504 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-12-08 22:28:35,504 INFO L608 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-12-08 22:28:35,504 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-08 22:28:35,504 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 270 states and 364 transitions. [2018-12-08 22:28:35,506 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-08 22:28:35,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-08 22:28:35,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-08 22:28:35,507 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-12-08 22:28:35,507 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-08 22:28:35,507 INFO L794 eck$LassoCheckResult]: Stem: 8504#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8505#L25 call main_#t~ret2 := fibo(main_~x~0);< 8542#fiboENTRY ~n := #in~n; 8601#L6 assume !(~n < 1); 8599#L8 assume !(1 == ~n); 8596#L11 call #t~ret0 := fibo(~n - 1);< 8597#fiboENTRY ~n := #in~n; 8612#L6 assume !(~n < 1); 8611#L8 assume !(1 == ~n); 8606#L11 call #t~ret0 := fibo(~n - 1);< 8610#fiboENTRY ~n := #in~n; 8614#L6 assume !(~n < 1); 8608#L8 assume !(1 == ~n); 8603#L11 call #t~ret0 := fibo(~n - 1);< 8607#fiboENTRY ~n := #in~n; 8635#L6 assume !(~n < 1); 8634#L8 assume !(1 == ~n); 8529#L11 call #t~ret0 := fibo(~n - 1);< 8627#fiboENTRY ~n := #in~n; 8646#L6 assume !(~n < 1); 8645#L8 assume !(1 == ~n); 8530#L11 call #t~ret0 := fibo(~n - 1);< 8627#fiboENTRY ~n := #in~n; 8646#L6 assume !(~n < 1); 8645#L8 assume !(1 == ~n); 8530#L11 call #t~ret0 := fibo(~n - 1);< 8627#fiboENTRY ~n := #in~n; 8647#L6 assume !(~n < 1); 8696#L8 assume 1 == ~n;#res := 1; 8680#fiboFINAL assume true; 8677#fiboEXIT >#32#return; 8528#L11-1 call #t~ret1 := fibo(~n - 2);< 8531#fiboENTRY ~n := #in~n; 8673#L6 assume ~n < 1;#res := 0; 8672#fiboFINAL assume true; 8671#fiboEXIT >#34#return; 8669#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8668#fiboFINAL assume true; 8658#fiboEXIT >#32#return; 8654#L11-1 call #t~ret1 := fibo(~n - 2);< 8655#fiboENTRY ~n := #in~n; 8664#L6 assume !(~n < 1); 8662#L8 assume 1 == ~n;#res := 1; 8550#fiboFINAL assume true; 8653#fiboEXIT >#34#return; 8617#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8648#fiboFINAL assume true; 8622#fiboEXIT >#32#return; 8549#L11-1 call #t~ret1 := fibo(~n - 2);< 8624#fiboENTRY ~n := #in~n; 8555#L6 assume !(~n < 1); 8546#L8 assume !(1 == ~n); 8539#L11 call #t~ret0 := fibo(~n - 1);< 8535#fiboENTRY ~n := #in~n; 8762#L6 assume !(~n < 1); 8763#L8 assume !(1 == ~n); 8557#L11 call #t~ret0 := fibo(~n - 1);< 8561#fiboENTRY ~n := #in~n; 8582#L6 assume !(~n < 1); 8580#L8 assume !(1 == ~n); 8558#L11 [2018-12-08 22:28:35,507 INFO L796 eck$LassoCheckResult]: Loop: 8558#L11 call #t~ret0 := fibo(~n - 1);< 8561#fiboENTRY ~n := #in~n; 8582#L6 assume !(~n < 1); 8580#L8 assume !(1 == ~n); 8558#L11 [2018-12-08 22:28:35,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash 272834295, now seen corresponding path program 3 times [2018-12-08 22:28:35,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:35,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:35,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:35,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 22:28:35,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-12-08 22:28:35,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 22:28:35,591 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 22:28:35,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 22:28:35,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-08 22:28:35,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 22:28:35,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-12-08 22:28:35,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 22:28:35,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 19 [2018-12-08 22:28:35,641 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-08 22:28:35,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-12-08 22:28:35,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 22:28:35,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 22:28:35,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:35,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 22:28:35,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 22:28:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 22:28:35,662 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:35,662 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:35,662 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:35,662 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:35,662 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-08 22:28:35,662 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:35,662 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:35,662 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:35,662 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-12-08 22:28:35,662 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:35,662 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:35,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:35,664 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:35,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:35,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:35,694 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:35,694 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:35,696 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:35,696 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:35,698 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-08 22:28:35,698 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:35,712 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-08 22:28:35,712 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ae1b38bd-2260-4cb5-b996-9fbcc5d6bba4/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:35,730 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-08 22:28:35,730 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-08 22:28:36,489 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-08 22:28:36,491 INFO L216 LassoAnalysis]: Preferences: [2018-12-08 22:28:36,491 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-08 22:28:36,491 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-08 22:28:36,491 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-08 22:28:36,492 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-08 22:28:36,492 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-08 22:28:36,492 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-08 22:28:36,492 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-08 22:28:36,492 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-12-08 22:28:36,492 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-08 22:28:36,492 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-08 22:28:36,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:36,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:36,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:36,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-08 22:28:36,527 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-08 22:28:36,527 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-08 22:28:36,527 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 [2018-12-08 22:28:36,527 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:36,528 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:36,528 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:36,528 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:36,528 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:36,528 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:36,528 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:36,528 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-08 22:28:36,529 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 [2018-12-08 22:28:36,529 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-08 22:28:36,529 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-08 22:28:36,529 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-08 22:28:36,529 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-08 22:28:36,529 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-08 22:28:36,529 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-08 22:28:36,529 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-08 22:28:36,530 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-08 22:28:36,531 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-08 22:28:36,531 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-08 22:28:36,532 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-08 22:28:36,532 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-08 22:28:36,532 INFO L518 LassoAnalysis]: Proved termination. [2018-12-08 22:28:36,532 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-08 22:28:36,532 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-08 22:28:36,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:36,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:36,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:36,602 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-12-08 22:28:36,602 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-12-08 22:28:36,629 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 285 states and 380 transitions. Complement of second has 18 states. [2018-12-08 22:28:36,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-12-08 22:28:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-08 22:28:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-12-08 22:28:36,630 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 60 letters. Loop has 4 letters. [2018-12-08 22:28:36,630 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:36,630 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:36,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:36,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:36,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:36,712 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-12-08 22:28:36,712 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-12-08 22:28:36,757 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 291 states and 386 transitions. Complement of second has 17 states. [2018-12-08 22:28:36,758 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 [2018-12-08 22:28:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-08 22:28:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-12-08 22:28:36,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 60 letters. Loop has 4 letters. [2018-12-08 22:28:36,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:36,759 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-08 22:28:36,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 22:28:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:36,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 22:28:36,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 22:28:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 22:28:36,831 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-12-08 22:28:36,831 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-12-08 22:28:36,865 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 349 states and 462 transitions. Complement of second has 27 states. [2018-12-08 22:28:36,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-12-08 22:28:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-08 22:28:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-12-08 22:28:36,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 4 letters. [2018-12-08 22:28:36,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:36,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-12-08 22:28:36,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:36,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 8 letters. [2018-12-08 22:28:36,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-08 22:28:36,866 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 462 transitions. [2018-12-08 22:28:36,868 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-08 22:28:36,869 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 274 states and 369 transitions. [2018-12-08 22:28:36,870 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2018-12-08 22:28:36,870 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-12-08 22:28:36,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 274 states and 369 transitions. [2018-12-08 22:28:36,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-08 22:28:36,870 INFO L705 BuchiCegarLoop]: Abstraction has 274 states and 369 transitions. [2018-12-08 22:28:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states and 369 transitions. [2018-12-08 22:28:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-12-08 22:28:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-12-08 22:28:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-12-08 22:28:36,874 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-12-08 22:28:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-08 22:28:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-12-08 22:28:36,874 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 19 states. [2018-12-08 22:28:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 22:28:37,071 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2018-12-08 22:28:37,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 22:28:37,072 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 336 transitions. [2018-12-08 22:28:37,073 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-08 22:28:37,073 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 0 states and 0 transitions. [2018-12-08 22:28:37,073 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-08 22:28:37,073 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-08 22:28:37,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-08 22:28:37,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-08 22:28:37,073 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 22:28:37,073 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 22:28:37,074 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 22:28:37,074 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-08 22:28:37,074 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-08 22:28:37,074 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-08 22:28:37,074 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-08 22:28:37,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 08.12 10:28:37 BoogieIcfgContainer [2018-12-08 22:28:37,078 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-08 22:28:37,078 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 22:28:37,078 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 22:28:37,079 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 22:28:37,079 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 10:28:25" (3/4) ... [2018-12-08 22:28:37,082 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-08 22:28:37,082 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 22:28:37,083 INFO L168 Benchmark]: Toolchain (without parser) took 12070.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -116.3 MB). Peak memory consumption was 55.7 MB. Max. memory is 11.5 GB. [2018-12-08 22:28:37,083 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 22:28:37,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.62 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-08 22:28:37,084 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.46 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 22:28:37,084 INFO L168 Benchmark]: Boogie Preprocessor took 10.44 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 22:28:37,085 INFO L168 Benchmark]: RCFGBuilder took 135.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-08 22:28:37,085 INFO L168 Benchmark]: BuchiAutomizer took 11772.33 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.9 MB). Peak memory consumption was 91.3 MB. Max. memory is 11.5 GB. [2018-12-08 22:28:37,086 INFO L168 Benchmark]: Witness Printer took 3.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 22:28:37,088 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.62 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.46 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.44 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 135.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 11772.33 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.9 MB). Peak memory consumption was 91.3 MB. Max. memory is 11.5 GB. * Witness Printer took 3.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (6 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 11.7s and 8 iterations. TraceHistogramMax:12. Analysis of lassos took 8.9s. Construction of modules took 0.5s. Büchi inclusion checks took 1.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 342 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 369 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 239 SDtfs, 640 SDslu, 300 SDs, 0 SdLazy, 1132 SolverSat, 440 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 7.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...