./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 aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/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-aa41828 [2018-11-22 23:16:25,745 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 23:16:25,747 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 23:16:25,755 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 23:16:25,755 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 23:16:25,756 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 23:16:25,757 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 23:16:25,758 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 23:16:25,759 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 23:16:25,760 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 23:16:25,761 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 23:16:25,761 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 23:16:25,762 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 23:16:25,762 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 23:16:25,763 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 23:16:25,764 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 23:16:25,764 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 23:16:25,765 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 23:16:25,767 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 23:16:25,768 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 23:16:25,768 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 23:16:25,769 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 23:16:25,771 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 23:16:25,771 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 23:16:25,771 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 23:16:25,772 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 23:16:25,773 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 23:16:25,773 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 23:16:25,774 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 23:16:25,775 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 23:16:25,775 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 23:16:25,775 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 23:16:25,775 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 23:16:25,776 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 23:16:25,776 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 23:16:25,777 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 23:16:25,777 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-22 23:16:25,788 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 23:16:25,788 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 23:16:25,789 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 23:16:25,789 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 23:16:25,789 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 23:16:25,789 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-22 23:16:25,789 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-22 23:16:25,790 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-22 23:16:25,790 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-22 23:16:25,790 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-22 23:16:25,790 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-22 23:16:25,790 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 23:16:25,790 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 23:16:25,790 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-22 23:16:25,791 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 23:16:25,792 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 23:16:25,792 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-22 23:16:25,792 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 23:16:25,792 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-22 23:16:25,792 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 23:16:25,792 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 23:16:25,792 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-22 23:16:25,793 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 23:16:25,793 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 23:16:25,793 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-22 23:16:25,794 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-22 23:16:25,794 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/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 [2018-11-22 23:16:25,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 23:16:25,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 23:16:25,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 23:16:25,826 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 23:16:25,827 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 23:16:25,827 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-11-22 23:16:25,865 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/data/1f0fc0c78/1b9dc23366d34a69bf2c4ff7c6331e8d/FLAGc6d8d9c58 [2018-11-22 23:16:26,259 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 23:16:26,259 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-11-22 23:16:26,263 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/data/1f0fc0c78/1b9dc23366d34a69bf2c4ff7c6331e8d/FLAGc6d8d9c58 [2018-11-22 23:16:26,271 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/data/1f0fc0c78/1b9dc23366d34a69bf2c4ff7c6331e8d [2018-11-22 23:16:26,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 23:16:26,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 23:16:26,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 23:16:26,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 23:16:26,276 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 23:16:26,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63eb5d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26, skipping insertion in model container [2018-11-22 23:16:26,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 23:16:26,294 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 23:16:26,394 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:16:26,397 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 23:16:26,405 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:16:26,413 INFO L195 MainTranslator]: Completed translation [2018-11-22 23:16:26,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26 WrapperNode [2018-11-22 23:16:26,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 23:16:26,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 23:16:26,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 23:16:26,414 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 23:16:26,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 23:16:26,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 23:16:26,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 23:16:26,433 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 23:16:26,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... [2018-11-22 23:16:26,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 23:16:26,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 23:16:26,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 23:16:26,444 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 23:16:26,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 23:16:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 23:16:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-22 23:16:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-22 23:16:26,632 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 23:16:26,632 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-22 23:16:26,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:16:26 BoogieIcfgContainer [2018-11-22 23:16:26,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 23:16:26,633 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-22 23:16:26,633 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-22 23:16:26,636 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-22 23:16:26,637 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 23:16:26,637 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.11 11:16:26" (1/3) ... [2018-11-22 23:16:26,637 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@aea34f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 11:16:26, skipping insertion in model container [2018-11-22 23:16:26,638 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 23:16:26,638 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:16:26" (2/3) ... [2018-11-22 23:16:26,638 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@aea34f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 11:16:26, skipping insertion in model container [2018-11-22 23:16:26,638 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 23:16:26,638 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:16:26" (3/3) ... [2018-11-22 23:16:26,639 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_7_false-unreach-call_true-termination.c [2018-11-22 23:16:26,688 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 23:16:26,688 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-22 23:16:26,688 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-22 23:16:26,688 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-22 23:16:26,689 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 23:16:26,689 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 23:16:26,689 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-22 23:16:26,689 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 23:16:26,689 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-22 23:16:26,698 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-22 23:16:26,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 23:16:26,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:26,715 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:26,721 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-22 23:16:26,722 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-22 23:16:26,722 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-22 23:16:26,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-22 23:16:26,723 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 23:16:26,723 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:26,723 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:26,724 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-22 23:16:26,724 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-22 23:16:26,730 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-22 23:16:26,731 INFO L796 eck$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 [2018-11-22 23:16:26,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:26,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-22 23:16:26,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:26,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:26,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:26,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:26,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:26,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-22 23:16:26,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:26,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:26,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:26,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:26,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:26,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:26,812 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-22 23:16:26,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:26,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:26,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:26,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:26,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:26,894 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:26,895 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:26,895 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:26,895 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:26,895 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 23:16:26,895 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:26,895 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:26,896 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:26,896 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-22 23:16:26,896 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:26,896 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:26,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:26,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:26,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:26,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:26,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,008 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:27,010 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,015 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:27,016 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:27,025 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:27,025 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,049 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:27,049 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:27,052 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:27,052 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,067 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:27,067 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:27,069 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:27,069 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,084 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:27,084 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:27,086 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:27,086 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,101 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:27,101 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,117 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 23:16:27,117 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:27,134 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 23:16:27,135 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:27,135 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:27,135 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:27,135 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:27,135 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 23:16:27,135 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,135 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:27,135 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:27,136 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-22 23:16:27,136 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:27,136 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:27,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,200 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:27,204 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 23:16:27,206 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:27,207 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:27,207 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:27,208 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:27,208 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:27,208 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:27,210 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:27,210 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:27,213 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:27,214 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:27,214 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:27,215 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:27,215 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:27,215 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:27,215 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:27,216 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:27,216 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:27,217 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:27,217 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:27,218 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:27,218 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:27,218 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:27,218 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:27,218 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:27,219 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:27,219 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:27,220 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:27,220 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:27,221 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:27,221 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:27,221 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:27,221 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:27,221 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:27,222 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:27,222 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:27,223 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:27,223 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:27,224 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:27,224 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:27,224 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:27,224 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:27,224 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:27,225 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:27,225 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:27,229 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 23:16:27,232 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 23:16:27,232 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 23:16:27,233 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 23:16:27,233 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 23:16:27,233 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 23:16:27,234 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-22 23:16:27,234 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 23:16:27,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:27,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:27,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:27,317 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-22 23:16:27,319 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-22 23:16:27,422 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. [2018-11-22 23:16:27,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-22 23:16:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-22 23:16:27,426 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-22 23:16:27,427 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:27,427 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-22 23:16:27,428 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:27,428 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-22 23:16:27,428 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:27,429 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-22 23:16:27,432 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 23:16:27,437 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-22 23:16:27,438 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-22 23:16:27,438 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-22 23:16:27,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-22 23:16:27,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:27,440 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-22 23:16:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-22 23:16:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-22 23:16:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-22 23:16:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-22 23:16:27,462 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-22 23:16:27,462 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-22 23:16:27,462 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-22 23:16:27,462 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-22 23:16:27,463 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 23:16:27,463 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:27,463 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:27,464 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:27,464 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:27,465 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-22 23:16:27,465 INFO L796 eck$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 [2018-11-22 23:16:27,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-22 23:16:27,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:27,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:27,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:27,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 23:16:27,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 23:16:27,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 23:16:27,530 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 23:16:27,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-22 23:16:27,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:27,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:27,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:27,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 23:16:27,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 23:16:27,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 23:16:27,562 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 23:16:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 23:16:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 23:16:27,564 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-22 23:16:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:16:27,634 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-22 23:16:27,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 23:16:27,635 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-22 23:16:27,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 23:16:27,638 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-22 23:16:27,638 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-22 23:16:27,639 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-22 23:16:27,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-22 23:16:27,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:27,639 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-22 23:16:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-22 23:16:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-22 23:16:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-22 23:16:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-22 23:16:27,643 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-22 23:16:27,643 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-22 23:16:27,644 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-22 23:16:27,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-22 23:16:27,644 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 23:16:27,644 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:27,644 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:27,645 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:27,645 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:27,645 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-22 23:16:27,645 INFO L796 eck$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 [2018-11-22 23:16:27,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:27,646 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-22 23:16:27,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:27,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:27,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:27,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:27,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:16:27,700 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:16:27,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:27,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:27,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:16:27,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-22 23:16:27,731 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 23:16:27,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-22 23:16:27,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:27,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:27,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:27,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:27,822 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:27,822 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:27,822 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:27,822 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:27,822 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 23:16:27,822 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,822 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:27,823 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:27,823 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-22 23:16:27,823 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:27,823 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:27,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:27,867 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:27,867 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,869 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:27,869 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:27,885 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 23:16:27,885 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:28,383 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 23:16:28,384 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:28,384 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:28,384 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:28,385 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:28,385 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 23:16:28,385 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:28,385 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:28,385 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:28,385 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-22 23:16:28,385 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:28,385 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:28,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,425 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:28,425 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 23:16:28,425 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:28,426 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:28,429 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:28,429 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:28,430 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:28,430 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:28,430 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:28,430 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:28,432 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:28,433 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:28,433 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:28,433 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:28,433 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:28,433 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:28,434 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:28,434 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:28,434 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:28,439 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 23:16:28,442 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 23:16:28,442 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 23:16:28,443 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 23:16:28,443 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 23:16:28,443 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 23:16:28,443 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-22 23:16:28,444 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 23:16:28,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:28,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:28,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:28,530 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-22 23:16:28,530 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-22 23:16:28,639 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. [2018-11-22 23:16:28,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-22 23:16:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-22 23:16:28,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-22 23:16:28,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:28,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-22 23:16:28,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:28,642 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-22 23:16:28,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:28,642 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-22 23:16:28,647 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-22 23:16:28,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-22 23:16:28,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-22 23:16:28,650 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-22 23:16:28,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-22 23:16:28,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:28,650 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-22 23:16:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-22 23:16:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-22 23:16:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-22 23:16:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-22 23:16:28,658 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-22 23:16:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 23:16:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-22 23:16:28,659 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-22 23:16:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:16:28,709 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-22 23:16:28,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 23:16:28,709 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-22 23:16:28,711 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-22 23:16:28,713 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-22 23:16:28,713 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-22 23:16:28,713 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-22 23:16:28,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-22 23:16:28,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:28,714 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-22 23:16:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-22 23:16:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-22 23:16:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-22 23:16:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-22 23:16:28,720 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-22 23:16:28,720 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-22 23:16:28,720 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-22 23:16:28,720 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-22 23:16:28,723 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-22 23:16:28,723 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:28,723 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:28,724 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:28,724 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:28,725 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~ret1;havoc #t~ret0; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-11-22 23:16:28,725 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 [2018-11-22 23:16:28,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:28,725 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-22 23:16:28,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:28,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:28,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:28,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:28,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-22 23:16:28,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:16:28,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:16:28,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:28,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-22 23:16:28,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:16:28,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-22 23:16:28,831 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 23:16:28,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-22 23:16:28,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:28,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:28,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:28,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:28,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:28,906 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:28,906 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:28,906 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:28,906 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:28,906 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 23:16:28,906 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:28,906 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:28,906 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:28,906 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-22 23:16:28,906 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:28,906 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:28,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:28,938 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:28,938 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:28,940 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:28,940 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:28,959 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 23:16:28,959 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:29,455 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 23:16:29,457 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:29,457 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:29,457 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:29,457 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:29,457 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 23:16:29,458 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:29,458 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:29,458 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:29,458 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-22 23:16:29,458 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:29,458 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:29,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:29,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:29,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:29,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:29,501 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:29,501 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 23:16:29,501 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:29,502 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:29,502 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:29,502 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:29,502 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:29,502 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:29,503 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:29,503 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:29,504 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:29,504 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:29,504 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:29,504 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:29,505 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:29,505 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:29,505 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:29,505 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:29,505 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:29,506 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:29,506 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:29,507 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:29,507 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:29,507 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:29,507 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:29,507 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:29,507 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:29,507 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:29,509 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:29,509 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:29,510 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:29,510 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:29,510 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:29,510 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:29,510 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:29,511 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:29,511 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:29,517 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 23:16:29,519 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 23:16:29,519 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 23:16:29,520 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 23:16:29,520 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 23:16:29,520 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 23:16:29,520 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-22 23:16:29,520 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 23:16:29,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:29,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:29,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:29,603 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-22 23:16:29,604 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-22 23:16:29,695 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. [2018-11-22 23:16:29,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-22 23:16:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-22 23:16:29,698 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-22 23:16:29,698 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:29,698 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:29,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:29,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:29,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:29,783 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-22 23:16:29,783 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-22 23:16:29,870 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. [2018-11-22 23:16:29,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-22 23:16:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-22 23:16:29,872 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-22 23:16:29,872 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:29,872 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:29,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:29,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:29,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:29,949 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-22 23:16:29,949 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-22 23:16:30,049 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. [2018-11-22 23:16:30,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-22 23:16:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-22 23:16:30,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-22 23:16:30,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-22 23:16:30,059 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-22 23:16:30,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,060 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-22 23:16:30,071 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-22 23:16:30,080 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-22 23:16:30,080 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-22 23:16:30,081 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-22 23:16:30,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-22 23:16:30,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:30,081 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-22 23:16:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-22 23:16:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-22 23:16:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-22 23:16:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-22 23:16:30,109 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-22 23:16:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 23:16:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-22 23:16:30,109 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-22 23:16:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:16:30,236 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-11-22 23:16:30,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 23:16:30,237 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-11-22 23:16:30,242 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-22 23:16:30,248 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-11-22 23:16:30,248 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-22 23:16:30,248 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-22 23:16:30,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-11-22 23:16:30,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:30,249 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-11-22 23:16:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-11-22 23:16:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-11-22 23:16:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-11-22 23:16:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-11-22 23:16:30,270 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-22 23:16:30,270 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-22 23:16:30,270 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-22 23:16:30,270 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-11-22 23:16:30,272 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-22 23:16:30,272 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:30,272 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:30,273 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:30,273 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-22 23:16:30,273 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-22 23:16:30,273 INFO L796 eck$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 [2018-11-22 23:16:30,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-22 23:16:30,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:30,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:30,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:30,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:16:30,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-22 23:16:30,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:16:30,321 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:16:30,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-22 23:16:30,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:16:30,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-22 23:16:30,447 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 23:16:30,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-22 23:16:30,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:30,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:30,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:30,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:16:30,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:30,482 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:30,482 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:30,482 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:30,482 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:30,482 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 23:16:30,482 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:30,482 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:30,482 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:30,483 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-22 23:16:30,483 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:30,483 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:30,483 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,514 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:30,514 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:30,518 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:30,518 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:30,520 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:30,520 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:30,538 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:30,538 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:30,555 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 23:16:30,555 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:30,579 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 23:16:30,580 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:30,580 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:30,580 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:30,580 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:30,580 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 23:16:30,580 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:30,580 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:30,581 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:30,581 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-22 23:16:30,581 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:30,581 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:30,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:30,626 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:30,626 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 23:16:30,626 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:30,626 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:30,626 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:30,627 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:30,627 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:30,627 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:30,627 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:30,627 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:30,632 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 23:16:30,634 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 23:16:30,634 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 23:16:30,634 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 23:16:30,634 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 23:16:30,634 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 23:16:30,634 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-22 23:16:30,635 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 23:16:30,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:30,695 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-22 23:16:30,695 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-22 23:16:30,731 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. [2018-11-22 23:16:30,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 23:16:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-22 23:16:30,732 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-22 23:16:30,732 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,732 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:30,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:30,815 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-22 23:16:30,815 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-22 23:16:30,854 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. [2018-11-22 23:16:30,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 23:16:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-22 23:16:30,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-22 23:16:30,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,862 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:30,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:30,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:30,922 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-22 23:16:30,922 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-22 23:16:30,968 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. [2018-11-22 23:16:30,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 23:16:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-22 23:16:30,978 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-22 23:16:30,978 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,978 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-22 23:16:30,978 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,978 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-22 23:16:30,979 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:30,979 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-11-22 23:16:30,984 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-22 23:16:30,988 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-11-22 23:16:30,988 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-22 23:16:30,989 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-11-22 23:16:30,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-11-22 23:16:30,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:30,989 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-11-22 23:16:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-11-22 23:16:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-11-22 23:16:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-22 23:16:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-11-22 23:16:31,002 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-11-22 23:16:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 23:16:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-22 23:16:31,004 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-11-22 23:16:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:16:31,236 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-11-22 23:16:31,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 23:16:31,236 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-11-22 23:16:31,237 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-22 23:16:31,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-11-22 23:16:31,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-11-22 23:16:31,239 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-22 23:16:31,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-11-22 23:16:31,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:31,240 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-11-22 23:16:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-11-22 23:16:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-11-22 23:16:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-22 23:16:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-22 23:16:31,244 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-22 23:16:31,244 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-22 23:16:31,244 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-22 23:16:31,244 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-11-22 23:16:31,245 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-22 23:16:31,245 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:31,245 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:31,246 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-22 23:16:31,246 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-22 23:16:31,246 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~ret1;havoc #t~ret0; 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 [2018-11-22 23:16:31,246 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 [2018-11-22 23:16:31,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-11-22 23:16:31,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:31,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:31,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:31,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:16:31,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-22 23:16:31,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:16:31,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:16:31,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 23:16:31,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 23:16:31,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:16:31,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-22 23:16:31,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:16:31,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-22 23:16:31,417 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 23:16:31,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-11-22 23:16:31,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:31,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:31,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:31,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:16:31,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:31,444 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:31,444 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:31,444 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:31,444 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:31,444 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 23:16:31,444 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:31,444 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:31,444 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:31,444 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-22 23:16:31,444 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:31,444 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:31,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:31,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:31,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:31,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:31,471 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:31,471 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:31,477 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:31,477 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:31,479 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:31,479 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:31,502 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:31,502 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:31,520 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 23:16:31,520 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:37,101 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 23:16:37,103 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:37,103 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:37,103 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:37,103 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:37,103 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 23:16:37,103 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:37,103 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:37,103 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:37,103 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-22 23:16:37,103 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:37,103 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:37,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,130 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:37,130 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 23:16:37,131 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:37,131 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:37,131 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:37,131 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:37,131 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:37,131 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:37,132 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:37,132 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:37,139 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 23:16:37,140 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 23:16:37,140 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 23:16:37,141 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 23:16:37,141 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 23:16:37,141 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 23:16:37,141 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-22 23:16:37,141 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 23:16:37,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:37,226 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-22 23:16:37,226 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-22 23:16:37,259 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. [2018-11-22 23:16:37,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 23:16:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-22 23:16:37,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-22 23:16:37,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:37,260 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:37,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:37,340 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-22 23:16:37,340 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-22 23:16:37,386 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. [2018-11-22 23:16:37,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 23:16:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-22 23:16:37,390 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-22 23:16:37,390 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:37,390 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:37,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:37,463 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-22 23:16:37,463 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-22 23:16:37,500 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. [2018-11-22 23:16:37,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 23:16:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-22 23:16:37,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-22 23:16:37,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:37,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-22 23:16:37,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:37,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-22 23:16:37,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:37,503 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-11-22 23:16:37,505 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-22 23:16:37,506 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-11-22 23:16:37,507 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-11-22 23:16:37,507 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-11-22 23:16:37,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-11-22 23:16:37,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:37,507 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-11-22 23:16:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-11-22 23:16:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-11-22 23:16:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-22 23:16:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-22 23:16:37,512 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-22 23:16:37,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 23:16:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-22 23:16:37,513 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-11-22 23:16:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:16:37,737 INFO L93 Difference]: Finished difference Result 344 states and 473 transitions. [2018-11-22 23:16:37,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 23:16:37,737 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 344 states and 473 transitions. [2018-11-22 23:16:37,740 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-22 23:16:37,743 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 344 states to 315 states and 437 transitions. [2018-11-22 23:16:37,743 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-11-22 23:16:37,744 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-22 23:16:37,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 437 transitions. [2018-11-22 23:16:37,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:37,744 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 437 transitions. [2018-11-22 23:16:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 437 transitions. [2018-11-22 23:16:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 270. [2018-11-22 23:16:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-22 23:16:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-11-22 23:16:37,754 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-22 23:16:37,754 INFO L608 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-22 23:16:37,754 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-22 23:16:37,755 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 270 states and 364 transitions. [2018-11-22 23:16:37,756 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-22 23:16:37,756 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 23:16:37,756 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 23:16:37,757 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-11-22 23:16:37,757 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-22 23:16:37,757 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~ret1;havoc #t~ret0; 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~ret1;havoc #t~ret0; 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 [2018-11-22 23:16:37,757 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 [2018-11-22 23:16:37,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:37,758 INFO L82 PathProgramCache]: Analyzing trace with hash 272834295, now seen corresponding path program 3 times [2018-11-22 23:16:37,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:37,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:37,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:37,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:16:37,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-22 23:16:37,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:16:37,846 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:16:37,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:16:37,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-22 23:16:37,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:16:37,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-22 23:16:37,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:16:37,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 19 [2018-11-22 23:16:37,895 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-22 23:16:37,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-11-22 23:16:37,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:16:37,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:16:37,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:37,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:16:37,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:16:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 23:16:37,918 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:37,918 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:37,918 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:37,918 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:37,919 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 23:16:37,919 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:37,919 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:37,919 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:37,919 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-22 23:16:37,919 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:37,919 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:37,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:37,949 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:37,949 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:37,951 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:37,951 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:37,953 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 23:16:37,953 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_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:37,969 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 23:16:37,969 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_01ecaaf0-e30f-4986-b8d4-c5b8014cbac9/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:37,987 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 23:16:37,987 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 23:16:38,774 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 23:16:38,775 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 23:16:38,775 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 23:16:38,775 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 23:16:38,776 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 23:16:38,776 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 23:16:38,776 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 23:16:38,776 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 23:16:38,776 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 23:16:38,776 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-22 23:16:38,776 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 23:16:38,776 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 23:16:38,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:38,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:38,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:38,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 23:16:38,806 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 23:16:38,807 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 23:16:38,807 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:38,807 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:38,807 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:38,808 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:38,808 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:38,808 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:38,808 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:38,808 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:38,809 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 23:16:38,809 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-22 23:16:38,809 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 23:16:38,810 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 23:16:38,810 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 23:16:38,810 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 23:16:38,810 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 23:16:38,810 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 23:16:38,810 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 23:16:38,812 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 23:16:38,814 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 23:16:38,814 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 23:16:38,814 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 23:16:38,814 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 23:16:38,815 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 23:16:38,815 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-22 23:16:38,815 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 23:16:38,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:38,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:38,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:38,897 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-22 23:16:38,897 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-22 23:16:38,929 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. [2018-11-22 23:16:38,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 23:16:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-22 23:16:38,930 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-22 23:16:38,930 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:38,930 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:38,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:38,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:38,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:39,030 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-22 23:16:39,030 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-22 23:16:39,075 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. [2018-11-22 23:16:39,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 23:16:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-22 23:16:39,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-22 23:16:39,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:39,077 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 23:16:39,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:16:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:39,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:16:39,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:16:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:16:39,162 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-22 23:16:39,162 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-22 23:16:39,195 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. [2018-11-22 23:16:39,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-22 23:16:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 23:16:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-22 23:16:39,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-22 23:16:39,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:39,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-22 23:16:39,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:39,197 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 8 letters. [2018-11-22 23:16:39,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 23:16:39,197 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 462 transitions. [2018-11-22 23:16:39,200 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-22 23:16:39,204 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 274 states and 369 transitions. [2018-11-22 23:16:39,204 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2018-11-22 23:16:39,204 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-22 23:16:39,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 274 states and 369 transitions. [2018-11-22 23:16:39,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 23:16:39,204 INFO L705 BuchiCegarLoop]: Abstraction has 274 states and 369 transitions. [2018-11-22 23:16:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states and 369 transitions. [2018-11-22 23:16:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-11-22 23:16:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-22 23:16:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-11-22 23:16:39,211 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-22 23:16:39,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 23:16:39,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-11-22 23:16:39,211 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 19 states. [2018-11-22 23:16:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:16:39,420 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2018-11-22 23:16:39,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 23:16:39,420 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 336 transitions. [2018-11-22 23:16:39,423 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 23:16:39,423 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 0 states and 0 transitions. [2018-11-22 23:16:39,423 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-22 23:16:39,423 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-22 23:16:39,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-22 23:16:39,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 23:16:39,423 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 23:16:39,423 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 23:16:39,423 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 23:16:39,423 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-22 23:16:39,423 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-22 23:16:39,424 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 23:16:39,424 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-22 23:16:39,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.11 11:16:39 BoogieIcfgContainer [2018-11-22 23:16:39,429 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-22 23:16:39,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 23:16:39,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 23:16:39,430 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 23:16:39,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:16:26" (3/4) ... [2018-11-22 23:16:39,436 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-22 23:16:39,436 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 23:16:39,437 INFO L168 Benchmark]: Toolchain (without parser) took 13163.17 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 341.3 MB). Free memory was 958.4 MB in the beginning and 1.2 GB in the end (delta: -246.6 MB). Peak memory consumption was 94.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:16:39,438 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:16:39,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.45 ms. Allocated memory is still 1.0 GB. Free memory was 958.4 MB in the beginning and 947.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:16:39,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.62 ms. Allocated memory is still 1.0 GB. Free memory was 947.6 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:16:39,439 INFO L168 Benchmark]: Boogie Preprocessor took 11.04 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:16:39,439 INFO L168 Benchmark]: RCFGBuilder took 188.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -214.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-11-22 23:16:39,440 INFO L168 Benchmark]: BuchiAutomizer took 12795.88 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 166.2 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -45.9 MB). Peak memory consumption was 120.3 MB. Max. memory is 11.5 GB. [2018-11-22 23:16:39,440 INFO L168 Benchmark]: Witness Printer took 6.50 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:16:39,442 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.45 ms. Allocated memory is still 1.0 GB. Free memory was 958.4 MB in the beginning and 947.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.62 ms. Allocated memory is still 1.0 GB. Free memory was 947.6 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.04 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 188.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -214.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 12795.88 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 166.2 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -45.9 MB). Peak memory consumption was 120.3 MB. Max. memory is 11.5 GB. * Witness Printer took 6.50 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 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 12.7s and 8 iterations. TraceHistogramMax:12. Analysis of lassos took 9.5s. Construction of modules took 0.7s. Büchi inclusion checks took 2.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 342 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 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, 0.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 7.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...