./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7_true-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_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 f612eebc128d68e9b4bc81ed92184f640c3b9bd4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 11:55:11,715 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 11:55:11,716 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 11:55:11,725 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 11:55:11,725 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 11:55:11,726 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 11:55:11,726 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 11:55:11,728 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 11:55:11,729 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 11:55:11,729 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 11:55:11,730 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 11:55:11,730 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 11:55:11,731 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 11:55:11,732 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 11:55:11,732 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 11:55:11,733 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 11:55:11,734 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 11:55:11,735 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 11:55:11,736 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 11:55:11,738 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 11:55:11,738 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 11:55:11,739 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 11:55:11,741 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 11:55:11,741 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 11:55:11,741 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 11:55:11,742 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 11:55:11,743 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 11:55:11,743 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 11:55:11,744 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 11:55:11,745 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 11:55:11,745 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 11:55:11,746 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 11:55:11,746 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 11:55:11,746 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 11:55:11,747 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 11:55:11,747 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 11:55:11,747 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-23 11:55:11,758 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 11:55:11,759 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 11:55:11,760 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 11:55:11,760 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 11:55:11,760 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 11:55:11,760 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 11:55:11,760 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 11:55:11,760 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 11:55:11,760 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 11:55:11,761 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 11:55:11,761 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 11:55:11,762 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 11:55:11,762 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 11:55:11,763 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 11:55:11,763 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 11:55:11,763 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 11:55:11,763 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 11:55:11,763 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 11:55:11,763 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_80bba930-4ddd-4180-8012-59bde457772a/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 -> f612eebc128d68e9b4bc81ed92184f640c3b9bd4 [2018-11-23 11:55:11,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 11:55:11,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 11:55:11,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 11:55:11,797 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 11:55:11,797 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 11:55:11,797 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c [2018-11-23 11:55:11,839 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/data/894221e4d/db548f0a9eab4dee93d34c1f02ae3b10/FLAG8083fcf89 [2018-11-23 11:55:12,180 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 11:55:12,180 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c [2018-11-23 11:55:12,185 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/data/894221e4d/db548f0a9eab4dee93d34c1f02ae3b10/FLAG8083fcf89 [2018-11-23 11:55:12,603 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/bin-2019/uautomizer/data/894221e4d/db548f0a9eab4dee93d34c1f02ae3b10 [2018-11-23 11:55:12,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 11:55:12,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 11:55:12,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 11:55:12,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 11:55:12,610 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 11:55:12,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12858536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12, skipping insertion in model container [2018-11-23 11:55:12,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 11:55:12,631 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 11:55:12,741 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 11:55:12,743 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 11:55:12,752 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 11:55:12,762 INFO L195 MainTranslator]: Completed translation [2018-11-23 11:55:12,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12 WrapperNode [2018-11-23 11:55:12,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 11:55:12,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 11:55:12,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 11:55:12,763 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 11:55:12,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 11:55:12,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 11:55:12,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 11:55:12,782 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 11:55:12,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... [2018-11-23 11:55:12,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 11:55:12,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 11:55:12,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 11:55:12,792 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 11:55:12,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:12,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 11:55:12,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 11:55:12,870 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 11:55:12,870 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 11:55:12,965 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 11:55:12,965 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 11:55:12,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:12 BoogieIcfgContainer [2018-11-23 11:55:12,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 11:55:12,966 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 11:55:12,966 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 11:55:12,969 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 11:55:12,970 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 11:55:12,970 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 11:55:12" (1/3) ... [2018-11-23 11:55:12,971 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f20771a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 11:55:12, skipping insertion in model container [2018-11-23 11:55:12,971 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 11:55:12,971 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:12" (2/3) ... [2018-11-23 11:55:12,972 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f20771a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 11:55:12, skipping insertion in model container [2018-11-23 11:55:12,972 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 11:55:12,972 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:12" (3/3) ... [2018-11-23 11:55:12,973 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_7_true-unreach-call_true-termination.c [2018-11-23 11:55:13,019 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 11:55:13,020 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 11:55:13,020 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 11:55:13,020 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 11:55:13,020 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 11:55:13,020 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 11:55:13,020 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 11:55:13,021 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 11:55:13,021 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 11:55:13,033 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 11:55:13,052 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 11:55:13,052 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:13,052 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:13,059 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 11:55:13,059 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 11:55:13,060 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 11:55:13,060 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 11:55:13,061 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 11:55:13,062 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:13,062 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:13,062 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 11:55:13,062 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 11:55:13,069 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-23 11:55:13,069 INFO L796 eck$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 [2018-11-23 11:55:13,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-23 11:55:13,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:13,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:13,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:13,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-23 11:55:13,142 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:13,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:13,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:13,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-23 11:55:13,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:13,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:13,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:13,227 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:13,228 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:13,228 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:13,228 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:13,228 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 11:55:13,228 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:13,228 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:13,229 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:13,229 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 11:55:13,229 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:13,229 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:13,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,318 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:13,318 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,326 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:13,326 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:13,336 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:13,336 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,351 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:13,351 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:13,354 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:13,354 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,369 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:13,370 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:13,372 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:13,372 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,397 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:13,397 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:13,399 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:13,400 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,415 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:13,415 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,433 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 11:55:13,433 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:13,452 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 11:55:13,453 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:13,453 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:13,453 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:13,453 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:13,453 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 11:55:13,453 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:13,453 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:13,453 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:13,453 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 11:55:13,454 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:13,454 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:13,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:13,518 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:13,522 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 11:55:13,523 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 11:55:13,524 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:13,524 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:13,525 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:13,525 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:13,525 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:13,526 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:13,526 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:13,529 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:13,530 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 [2018-11-23 11:55:13,530 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:13,530 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:13,531 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:13,531 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:13,531 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:13,531 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:13,531 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:13,532 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:13,533 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 [2018-11-23 11:55:13,533 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:13,533 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:13,534 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:13,534 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:13,534 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:13,534 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:13,534 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:13,535 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:13,536 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 [2018-11-23 11:55:13,536 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:13,536 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:13,537 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:13,537 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:13,537 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:13,537 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:13,537 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:13,538 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:13,539 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 [2018-11-23 11:55:13,539 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:13,539 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:13,540 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:13,540 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:13,540 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:13,540 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:13,541 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:13,545 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 11:55:13,549 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 11:55:13,549 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 11:55:13,550 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 11:55:13,550 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 11:55:13,551 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 11:55:13,551 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 11:55:13,551 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 11:55:13,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:13,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:13,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:13,633 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 [2018-11-23 11:55:13,634 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-23 11:55:13,712 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. [2018-11-23 11:55:13,712 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 [2018-11-23 11:55:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 11:55:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-23 11:55:13,715 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-23 11:55:13,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:13,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 11:55:13,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:13,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 11:55:13,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:13,718 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-23 11:55:13,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 11:55:13,725 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-23 11:55:13,725 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 11:55:13,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 11:55:13,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-23 11:55:13,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:13,727 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-23 11:55:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-23 11:55:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-23 11:55:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 11:55:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-23 11:55:13,747 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 11:55:13,747 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 11:55:13,747 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 11:55:13,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-23 11:55:13,748 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 11:55:13,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:13,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:13,749 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:13,749 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:13,749 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-23 11:55:13,749 INFO L796 eck$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 [2018-11-23 11:55:13,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,750 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-23 11:55:13,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:13,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:13,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 11:55:13,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:55:13,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 11:55:13,818 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 11:55:13,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-23 11:55:13,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:13,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:13,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 11:55:13,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:55:13,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 11:55:13,863 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 11:55:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 11:55:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 11:55:13,866 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-23 11:55:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:55:13,941 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 11:55:13,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 11:55:13,942 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-23 11:55:13,943 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 11:55:13,944 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-23 11:55:13,944 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-23 11:55:13,945 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-23 11:55:13,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-23 11:55:13,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:13,945 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 11:55:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-23 11:55:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 11:55:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 11:55:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-23 11:55:13,948 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 11:55:13,948 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 11:55:13,948 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 11:55:13,948 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-23 11:55:13,949 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 11:55:13,949 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:13,949 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:13,950 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:13,950 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:13,950 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-23 11:55:13,950 INFO L796 eck$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 [2018-11-23 11:55:13,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-23 11:55:13,951 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:13,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:13,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:13,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:55:13,984 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:13,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:13,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:14,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 11:55:14,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 11:55:14,016 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 11:55:14,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-23 11:55:14,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:14,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:14,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:14,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:14,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:14,104 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:14,104 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:14,104 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:14,104 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:14,104 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 11:55:14,104 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:14,104 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:14,105 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:14,105 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 11:55:14,105 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:14,105 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:14,106 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,152 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:14,153 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:14,158 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:14,158 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:14,175 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 11:55:14,175 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:14,680 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 11:55:14,682 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:14,682 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:14,682 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:14,682 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:14,682 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 11:55:14,682 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:14,682 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:14,682 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:14,682 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 11:55:14,683 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:14,683 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:14,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:14,737 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:14,737 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 11:55:14,738 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 [2018-11-23 11:55:14,738 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:14,738 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:14,739 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:14,739 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:14,739 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:14,739 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:14,739 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:14,741 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:14,741 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 [2018-11-23 11:55:14,742 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:14,742 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:14,742 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:14,743 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:14,743 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:14,743 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:14,743 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:14,747 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 11:55:14,750 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 11:55:14,750 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 11:55:14,750 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 11:55:14,751 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 11:55:14,751 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 11:55:14,751 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 11:55:14,751 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 11:55:14,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:14,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:14,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:14,838 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 [2018-11-23 11:55:14,839 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-23 11:55:14,941 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. [2018-11-23 11:55:14,942 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 [2018-11-23 11:55:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 11:55:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 11:55:14,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-23 11:55:14,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:14,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-23 11:55:14,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:14,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-23 11:55:14,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:14,944 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-23 11:55:14,950 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 11:55:14,954 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-23 11:55:14,954 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-23 11:55:14,954 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 11:55:14,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-23 11:55:14,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:14,955 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-23 11:55:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-23 11:55:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-23 11:55:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 11:55:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-23 11:55:14,963 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-23 11:55:14,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 11:55:14,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 11:55:14,963 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-23 11:55:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:55:15,018 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-23 11:55:15,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 11:55:15,018 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-23 11:55:15,021 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 11:55:15,023 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-23 11:55:15,023 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-23 11:55:15,023 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 11:55:15,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-23 11:55:15,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:15,023 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-23 11:55:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-23 11:55:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-23 11:55:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 11:55:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-23 11:55:15,030 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 11:55:15,030 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 11:55:15,030 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 11:55:15,030 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-23 11:55:15,031 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 11:55:15,032 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:15,032 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:15,033 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:15,033 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:15,033 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-11-23 11:55:15,033 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 [2018-11-23 11:55:15,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-23 11:55:15,033 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:15,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:15,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:15,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:15,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 11:55:15,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:55:15,085 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:15,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:15,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 11:55:15,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 11:55:15,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 11:55:15,127 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 11:55:15,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-23 11:55:15,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:15,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:15,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:15,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:15,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:15,188 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:15,189 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:15,189 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:15,189 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:15,189 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 11:55:15,189 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:15,189 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:15,189 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:15,189 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 11:55:15,189 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:15,189 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:15,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,227 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:15,227 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:15,229 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:15,229 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:15,248 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 11:55:15,248 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:15,747 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 11:55:15,749 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:15,749 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:15,749 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:15,749 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:15,749 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 11:55:15,749 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:15,749 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:15,749 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:15,750 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 11:55:15,750 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:15,750 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:15,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:15,781 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:15,781 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 11:55:15,781 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 [2018-11-23 11:55:15,782 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:15,782 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:15,782 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:15,782 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:15,782 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:15,782 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:15,782 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:15,783 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:15,784 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 [2018-11-23 11:55:15,784 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:15,784 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:15,784 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:15,784 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:15,784 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:15,785 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:15,785 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:15,785 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:15,786 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 [2018-11-23 11:55:15,786 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:15,786 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:15,786 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:15,786 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:15,786 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:15,787 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:15,787 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:15,788 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:15,789 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 11:55:15,789 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:15,789 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:15,789 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:15,789 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:15,790 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:15,790 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:15,790 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:15,793 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 11:55:15,795 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 11:55:15,795 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 11:55:15,796 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 11:55:15,796 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 11:55:15,796 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 11:55:15,796 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 11:55:15,796 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 11:55:15,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:15,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:15,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:15,868 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 [2018-11-23 11:55:15,868 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 11:55:15,952 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. [2018-11-23 11:55:15,952 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 [2018-11-23 11:55:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 11:55:15,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 11:55:15,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 11:55:15,953 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:15,953 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:15,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:15,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:16,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:16,039 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 [2018-11-23 11:55:16,039 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 11:55:16,131 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. [2018-11-23 11:55:16,133 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 [2018-11-23 11:55:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 11:55:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-23 11:55:16,134 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 11:55:16,134 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:16,134 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:16,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:16,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:16,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:16,223 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 [2018-11-23 11:55:16,223 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 11:55:16,375 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. [2018-11-23 11:55:16,376 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 [2018-11-23 11:55:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 11:55:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-23 11:55:16,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 11:55:16,378 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:16,378 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-23 11:55:16,378 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:16,378 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-23 11:55:16,379 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:16,379 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-23 11:55:16,391 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 11:55:16,399 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-23 11:55:16,399 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-23 11:55:16,400 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-23 11:55:16,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-23 11:55:16,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:16,400 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-23 11:55:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-23 11:55:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-23 11:55:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-23 11:55:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-23 11:55:16,427 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-23 11:55:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 11:55:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 11:55:16,428 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-23 11:55:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:55:16,573 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-11-23 11:55:16,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 11:55:16,576 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-11-23 11:55:16,583 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 11:55:16,591 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-11-23 11:55:16,592 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-23 11:55:16,592 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-23 11:55:16,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-11-23 11:55:16,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:16,593 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-11-23 11:55:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-11-23 11:55:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-11-23 11:55:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-11-23 11:55:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-11-23 11:55:16,614 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 11:55:16,614 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 11:55:16,614 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 11:55:16,615 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-11-23 11:55:16,617 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 11:55:16,617 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:16,617 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:16,618 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:16,618 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 11:55:16,618 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-23 11:55:16,618 INFO L796 eck$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 [2018-11-23 11:55:16,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-23 11:55:16,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:16,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:16,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:16,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 11:55:16,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-23 11:55:16,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:55:16,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:16,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:16,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 11:55:16,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 11:55:16,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-23 11:55:16,796 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 11:55:16,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-23 11:55:16,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:16,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:16,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:16,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:55:16,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:16,834 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:16,835 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:16,835 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:16,835 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:16,835 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 11:55:16,835 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:16,835 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:16,835 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:16,835 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 11:55:16,835 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:16,835 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:16,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,876 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:16,876 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:16,878 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:16,878 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:16,880 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:16,881 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:16,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:16,907 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:16,925 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 11:55:16,926 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:16,943 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 11:55:16,944 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:16,944 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:16,944 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:16,944 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:16,944 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 11:55:16,944 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:16,945 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:16,945 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:16,945 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 11:55:16,945 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:16,945 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:16,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:16,983 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:16,984 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 11:55:16,984 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 [2018-11-23 11:55:16,984 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:16,985 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:16,985 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:16,985 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:16,985 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:16,985 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:16,985 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:16,987 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 11:55:16,993 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 11:55:16,993 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 11:55:16,993 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 11:55:16,993 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 11:55:16,994 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 11:55:16,994 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 11:55:16,994 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 11:55:17,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:17,075 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 [2018-11-23 11:55:17,075 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 11:55:17,118 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. [2018-11-23 11:55:17,119 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 [2018-11-23 11:55:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 11:55:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 11:55:17,120 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 11:55:17,120 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:17,120 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:17,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:17,189 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 [2018-11-23 11:55:17,189 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 11:55:17,229 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. [2018-11-23 11:55:17,229 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 [2018-11-23 11:55:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 11:55:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 11:55:17,230 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 11:55:17,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:17,230 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:17,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:17,301 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 [2018-11-23 11:55:17,301 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 11:55:17,350 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. [2018-11-23 11:55:17,351 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 [2018-11-23 11:55:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 11:55:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-23 11:55:17,351 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 11:55:17,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:17,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-23 11:55:17,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:17,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-23 11:55:17,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:17,352 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-11-23 11:55:17,355 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 11:55:17,359 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-11-23 11:55:17,359 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-23 11:55:17,359 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-11-23 11:55:17,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-11-23 11:55:17,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:17,360 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-11-23 11:55:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-11-23 11:55:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-11-23 11:55:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-23 11:55:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-11-23 11:55:17,368 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-11-23 11:55:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 11:55:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-23 11:55:17,369 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-11-23 11:55:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:55:17,504 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-11-23 11:55:17,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 11:55:17,505 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-11-23 11:55:17,507 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 11:55:17,508 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-11-23 11:55:17,508 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-11-23 11:55:17,509 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-23 11:55:17,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-11-23 11:55:17,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:17,509 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-11-23 11:55:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-11-23 11:55:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-11-23 11:55:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 11:55:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 11:55:17,514 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 11:55:17,514 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 11:55:17,514 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 11:55:17,515 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-11-23 11:55:17,515 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 11:55:17,515 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:17,515 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:17,516 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 11:55:17,516 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 11:55:17,517 INFO L794 eck$LassoCheckResult]: Stem: 6303#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 6304#L25 call main_#t~ret2 := fibo(main_~x~0);< 6333#fiboENTRY ~n := #in~n; 6400#L6 assume !(~n < 1); 6399#L8 assume !(1 == ~n); 6395#L11 call #t~ret0 := fibo(~n - 1);< 6398#fiboENTRY ~n := #in~n; 6397#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6390#L11 call #t~ret0 := fibo(~n - 1);< 6394#fiboENTRY ~n := #in~n; 6392#L6 assume !(~n < 1); 6393#L8 assume !(1 == ~n); 6323#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6384#L6 assume !(~n < 1); 6385#L8 assume 1 == ~n;#res := 1; 6497#fiboFINAL assume true; 6496#fiboEXIT >#32#return; 6298#L11-1 call #t~ret1 := fibo(~n - 2);< 6318#fiboENTRY ~n := #in~n; 6319#L6 assume ~n < 1;#res := 0; 6499#fiboFINAL assume true; 6297#fiboEXIT >#34#return; 6299#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 6471#fiboFINAL assume true; 6470#fiboEXIT >#32#return; 6330#L11-1 call #t~ret1 := fibo(~n - 2);< 6401#fiboENTRY ~n := #in~n; 6404#L6 assume !(~n < 1); 6484#L8 assume !(1 == ~n); 6306#L11 call #t~ret0 := fibo(~n - 1);< 6327#fiboENTRY ~n := #in~n; 6380#L6 assume !(~n < 1); 6370#L8 assume !(1 == ~n); 6352#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-23 11:55:17,517 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 [2018-11-23 11:55:17,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-11-23 11:55:17,517 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:17,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:17,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:17,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 11:55:17,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-23 11:55:17,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:55:17,580 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:17,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 11:55:17,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 11:55:17,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 11:55:17,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 11:55:17,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 11:55:17,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-23 11:55:17,707 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 11:55:17,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:17,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-11-23 11:55:17,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:17,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:17,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:17,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 11:55:17,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:17,741 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:17,741 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:17,741 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:17,741 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:17,741 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 11:55:17,741 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:17,741 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:17,741 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:17,741 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration6_Loop [2018-11-23 11:55:17,741 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:17,741 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:17,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:17,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:17,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:17,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:17,775 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:17,775 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:17,781 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:17,781 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:17,784 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:17,784 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:17,800 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:17,800 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:17,819 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 11:55:17,819 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:23,444 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 11:55:23,446 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:23,446 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:23,447 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:23,447 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:23,447 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 11:55:23,447 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:23,447 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:23,447 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:23,447 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration6_Loop [2018-11-23 11:55:23,447 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:23,447 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:23,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:23,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:23,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:23,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:23,480 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:23,480 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 11:55:23,480 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 [2018-11-23 11:55:23,481 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:23,481 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:23,481 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:23,481 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:23,481 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:23,482 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:23,482 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:23,484 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 11:55:23,485 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 11:55:23,486 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 11:55:23,486 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 11:55:23,486 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 11:55:23,486 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 11:55:23,486 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 11:55:23,486 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 11:55:23,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:23,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:23,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:23,587 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 [2018-11-23 11:55:23,587 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 11:55:23,625 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. [2018-11-23 11:55:23,626 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 [2018-11-23 11:55:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 11:55:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 11:55:23,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 11:55:23,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:23,627 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:23,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:23,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:23,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:23,740 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 [2018-11-23 11:55:23,740 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 11:55:23,787 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. [2018-11-23 11:55:23,787 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 [2018-11-23 11:55:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 11:55:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 11:55:23,788 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 11:55:23,788 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:23,788 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:23,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:23,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:23,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:23,866 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 [2018-11-23 11:55:23,866 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 11:55:23,909 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. [2018-11-23 11:55:23,909 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 [2018-11-23 11:55:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 11:55:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 11:55:23,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 11:55:23,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:23,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-23 11:55:23,911 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:23,911 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-23 11:55:23,911 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:23,911 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-11-23 11:55:23,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 11:55:23,915 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-11-23 11:55:23,915 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-11-23 11:55:23,915 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-11-23 11:55:23,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-11-23 11:55:23,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:23,915 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-11-23 11:55:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-11-23 11:55:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-11-23 11:55:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 11:55:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 11:55:23,920 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 11:55:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 11:55:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-23 11:55:23,920 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-11-23 11:55:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:55:24,157 INFO L93 Difference]: Finished difference Result 344 states and 473 transitions. [2018-11-23 11:55:24,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 11:55:24,158 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 344 states and 473 transitions. [2018-11-23 11:55:24,161 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 11:55:24,164 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 344 states to 315 states and 437 transitions. [2018-11-23 11:55:24,164 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-11-23 11:55:24,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-23 11:55:24,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 437 transitions. [2018-11-23 11:55:24,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:24,165 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 437 transitions. [2018-11-23 11:55:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 437 transitions. [2018-11-23 11:55:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 270. [2018-11-23 11:55:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-23 11:55:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-11-23 11:55:24,172 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-23 11:55:24,172 INFO L608 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-23 11:55:24,172 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-23 11:55:24,172 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 270 states and 364 transitions. [2018-11-23 11:55:24,174 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 11:55:24,174 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 11:55:24,174 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 11:55:24,175 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-11-23 11:55:24,175 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 11:55:24,175 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);< 8546#fiboENTRY ~n := #in~n; 8605#L6 assume !(~n < 1); 8603#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8601#fiboENTRY ~n := #in~n; 8616#L6 assume !(~n < 1); 8615#L8 assume !(1 == ~n); 8610#L11 call #t~ret0 := fibo(~n - 1);< 8614#fiboENTRY ~n := #in~n; 8618#L6 assume !(~n < 1); 8612#L8 assume !(1 == ~n); 8607#L11 call #t~ret0 := fibo(~n - 1);< 8611#fiboENTRY ~n := #in~n; 8639#L6 assume !(~n < 1); 8638#L8 assume !(1 == ~n); 8536#L11 call #t~ret0 := fibo(~n - 1);< 8631#fiboENTRY ~n := #in~n; 8650#L6 assume !(~n < 1); 8649#L8 assume !(1 == ~n); 8537#L11 call #t~ret0 := fibo(~n - 1);< 8631#fiboENTRY ~n := #in~n; 8650#L6 assume !(~n < 1); 8649#L8 assume !(1 == ~n); 8537#L11 call #t~ret0 := fibo(~n - 1);< 8631#fiboENTRY ~n := #in~n; 8651#L6 assume !(~n < 1); 8699#L8 assume 1 == ~n;#res := 1; 8684#fiboFINAL assume true; 8681#fiboEXIT >#32#return; 8535#L11-1 call #t~ret1 := fibo(~n - 2);< 8538#fiboENTRY ~n := #in~n; 8677#L6 assume ~n < 1;#res := 0; 8676#fiboFINAL assume true; 8675#fiboEXIT >#34#return; 8673#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8672#fiboFINAL assume true; 8662#fiboEXIT >#32#return; 8658#L11-1 call #t~ret1 := fibo(~n - 2);< 8659#fiboENTRY ~n := #in~n; 8668#L6 assume !(~n < 1); 8666#L8 assume 1 == ~n;#res := 1; 8554#fiboFINAL assume true; 8657#fiboEXIT >#34#return; 8621#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8652#fiboFINAL assume true; 8626#fiboEXIT >#32#return; 8553#L11-1 call #t~ret1 := fibo(~n - 2);< 8628#fiboENTRY ~n := #in~n; 8559#L6 assume !(~n < 1); 8550#L8 assume !(1 == ~n); 8507#L11 call #t~ret0 := fibo(~n - 1);< 8540#fiboENTRY ~n := #in~n; 8755#L6 assume !(~n < 1); 8752#L8 assume !(1 == ~n); 8561#L11 call #t~ret0 := fibo(~n - 1);< 8565#fiboENTRY ~n := #in~n; 8586#L6 assume !(~n < 1); 8584#L8 assume !(1 == ~n); 8562#L11 [2018-11-23 11:55:24,175 INFO L796 eck$LassoCheckResult]: Loop: 8562#L11 call #t~ret0 := fibo(~n - 1);< 8565#fiboENTRY ~n := #in~n; 8586#L6 assume !(~n < 1); 8584#L8 assume !(1 == ~n); 8562#L11 [2018-11-23 11:55:24,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash 272834295, now seen corresponding path program 3 times [2018-11-23 11:55:24,175 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:24,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:24,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:24,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 11:55:24,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-23 11:55:24,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:55:24,298 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:24,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 11:55:24,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 11:55:24,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 11:55:24,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-23 11:55:24,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 11:55:24,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 19 [2018-11-23 11:55:24,375 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 11:55:24,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:24,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-11-23 11:55:24,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 11:55:24,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 11:55:24,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:24,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 11:55:24,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:55:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 11:55:24,403 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:24,403 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:24,403 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:24,403 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:24,403 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 11:55:24,403 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:24,403 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:24,403 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:24,403 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-23 11:55:24,403 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:24,403 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:24,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:24,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:24,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:24,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:24,435 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:24,435 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:24,437 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:24,437 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:24,439 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 11:55:24,440 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_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:24,456 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 11:55:24,457 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_80bba930-4ddd-4180-8012-59bde457772a/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 [2018-11-23 11:55:24,476 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 11:55:24,476 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 11:55:25,275 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 11:55:25,276 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 11:55:25,277 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 11:55:25,277 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 11:55:25,277 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 11:55:25,277 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 11:55:25,277 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 11:55:25,277 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 11:55:25,277 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 11:55:25,277 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-23 11:55:25,277 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 11:55:25,277 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 11:55:25,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:25,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:25,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:25,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 11:55:25,307 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 11:55:25,307 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 11:55:25,307 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 [2018-11-23 11:55:25,307 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:25,308 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:25,308 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:25,308 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:25,308 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:25,308 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:25,308 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:25,308 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 11:55:25,309 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 [2018-11-23 11:55:25,309 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 11:55:25,309 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 11:55:25,309 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 11:55:25,309 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 11:55:25,309 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 11:55:25,309 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 11:55:25,309 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 11:55:25,311 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 11:55:25,312 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 11:55:25,312 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 11:55:25,313 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 11:55:25,313 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 11:55:25,313 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 11:55:25,313 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 11:55:25,313 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 11:55:25,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:25,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:25,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:25,421 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 [2018-11-23 11:55:25,421 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-23 11:55:25,455 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. [2018-11-23 11:55:25,456 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 [2018-11-23 11:55:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 11:55:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 11:55:25,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-23 11:55:25,456 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:25,457 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:25,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:25,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:25,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:25,538 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 [2018-11-23 11:55:25,538 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-23 11:55:25,597 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. [2018-11-23 11:55:25,598 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 [2018-11-23 11:55:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 11:55:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 11:55:25,599 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-23 11:55:25,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:25,599 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 11:55:25,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:55:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:25,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:55:25,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 11:55:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 11:55:25,679 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 [2018-11-23 11:55:25,679 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 270 states and 364 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-23 11:55:25,715 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. [2018-11-23 11:55:25,715 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 [2018-11-23 11:55:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 11:55:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 11:55:25,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 4 letters. [2018-11-23 11:55:25,716 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:25,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 11:55:25,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:25,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 60 letters. Loop has 8 letters. [2018-11-23 11:55:25,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 11:55:25,717 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 462 transitions. [2018-11-23 11:55:25,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 11:55:25,723 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 274 states and 369 transitions. [2018-11-23 11:55:25,723 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2018-11-23 11:55:25,723 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-23 11:55:25,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 274 states and 369 transitions. [2018-11-23 11:55:25,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 11:55:25,723 INFO L705 BuchiCegarLoop]: Abstraction has 274 states and 369 transitions. [2018-11-23 11:55:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states and 369 transitions. [2018-11-23 11:55:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-11-23 11:55:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-23 11:55:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 364 transitions. [2018-11-23 11:55:25,734 INFO L728 BuchiCegarLoop]: Abstraction has 270 states and 364 transitions. [2018-11-23 11:55:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 11:55:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-11-23 11:55:25,734 INFO L87 Difference]: Start difference. First operand 270 states and 364 transitions. Second operand 19 states. [2018-11-23 11:55:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:55:25,925 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2018-11-23 11:55:25,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 11:55:25,925 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 336 transitions. [2018-11-23 11:55:25,927 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 11:55:25,928 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 0 states and 0 transitions. [2018-11-23 11:55:25,928 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 11:55:25,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 11:55:25,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 11:55:25,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 11:55:25,928 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 11:55:25,928 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 11:55:25,928 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 11:55:25,928 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-23 11:55:25,928 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 11:55:25,928 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 11:55:25,928 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 11:55:25,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 11:55:25 BoogieIcfgContainer [2018-11-23 11:55:25,937 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 11:55:25,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 11:55:25,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 11:55:25,938 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 11:55:25,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:12" (3/4) ... [2018-11-23 11:55:25,940 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 11:55:25,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 11:55:25,941 INFO L168 Benchmark]: Toolchain (without parser) took 13335.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.5 MB). Free memory was 958.2 MB in the beginning and 1.1 GB in the end (delta: -142.0 MB). Peak memory consumption was 63.5 MB. Max. memory is 11.5 GB. [2018-11-23 11:55:25,942 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 11:55:25,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.23 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 11:55:25,943 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.04 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 11:55:25,943 INFO L168 Benchmark]: Boogie Preprocessor took 9.72 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 11:55:25,943 INFO L168 Benchmark]: RCFGBuilder took 174.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -183.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-23 11:55:25,944 INFO L168 Benchmark]: BuchiAutomizer took 12970.72 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 11.5 GB. [2018-11-23 11:55:25,944 INFO L168 Benchmark]: Witness Printer took 3.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 11:55:25,946 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 155.23 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 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 19.04 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.72 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -183.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 12970.72 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (6 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 12.9s and 8 iterations. TraceHistogramMax:12. Analysis of lassos took 9.6s. Construction of modules took 0.6s. Büchi inclusion checks took 2.2s. 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, 0.6s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 7.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...