./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 64bit --witnessprinter.graph.data.programhash 871be16186d4378aec884efd2352a47ca4eb57bc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:21:45,117 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:21:45,119 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:21:45,127 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:21:45,127 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:21:45,128 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:21:45,129 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:21:45,130 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:21:45,131 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:21:45,132 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:21:45,132 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:21:45,133 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:21:45,133 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:21:45,134 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:21:45,135 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:21:45,135 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:21:45,136 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:21:45,137 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:21:45,138 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:21:45,139 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:21:45,140 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:21:45,141 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:21:45,142 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:21:45,143 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:21:45,143 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:21:45,143 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:21:45,144 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:21:45,145 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:21:45,145 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:21:45,146 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:21:45,146 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:21:45,147 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:21:45,147 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:21:45,147 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:21:45,148 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:21:45,148 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:21:45,148 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-28 12:21:45,159 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:21:45,159 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:21:45,160 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:21:45,161 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:21:45,161 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:21:45,161 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 12:21:45,161 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 12:21:45,161 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 12:21:45,161 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 12:21:45,161 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 12:21:45,162 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 12:21:45,162 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:21:45,162 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 12:21:45,162 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:21:45,162 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:21:45,162 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 12:21:45,163 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 12:21:45,163 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 12:21:45,163 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:21:45,163 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 12:21:45,163 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:21:45,163 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 12:21:45,163 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:21:45,164 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:21:45,164 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 12:21:45,164 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:21:45,164 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:21:45,164 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 12:21:45,165 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 12:21:45,165 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_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2018-11-28 12:21:45,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:21:45,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:21:45,200 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:21:45,201 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:21:45,201 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:21:45,202 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 12:21:45,247 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/data/01d71aa04/ffa2fd258a7548e092e6ed82d2256614/FLAG574fb7635 [2018-11-28 12:21:45,644 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:21:45,644 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 12:21:45,649 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/data/01d71aa04/ffa2fd258a7548e092e6ed82d2256614/FLAG574fb7635 [2018-11-28 12:21:45,659 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/data/01d71aa04/ffa2fd258a7548e092e6ed82d2256614 [2018-11-28 12:21:45,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:21:45,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:21:45,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:21:45,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:21:45,665 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:21:45,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bfeff71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45, skipping insertion in model container [2018-11-28 12:21:45,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:21:45,686 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:21:45,771 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:21:45,774 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:21:45,781 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:21:45,789 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:21:45,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45 WrapperNode [2018-11-28 12:21:45,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:21:45,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:21:45,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:21:45,790 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:21:45,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:21:45,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:21:45,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:21:45,810 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:21:45,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... [2018-11-28 12:21:45,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:21:45,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:21:45,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:21:45,820 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:21:45,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:45,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:21:45,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:21:45,899 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2018-11-28 12:21:45,899 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2018-11-28 12:21:45,979 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:21:45,979 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-28 12:21:45,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:21:45 BoogieIcfgContainer [2018-11-28 12:21:45,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:21:45,980 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 12:21:45,980 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 12:21:45,983 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 12:21:45,984 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 12:21:45,984 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 12:21:45" (1/3) ... [2018-11-28 12:21:45,985 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27d76e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 12:21:45, skipping insertion in model container [2018-11-28 12:21:45,985 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 12:21:45,985 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:21:45" (2/3) ... [2018-11-28 12:21:45,985 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27d76e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 12:21:45, skipping insertion in model container [2018-11-28 12:21:45,985 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 12:21:45,986 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:21:45" (3/3) ... [2018-11-28 12:21:45,987 INFO L375 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 12:21:46,023 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:21:46,023 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 12:21:46,024 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 12:21:46,024 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 12:21:46,024 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:21:46,024 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:21:46,024 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 12:21:46,024 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:21:46,024 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 12:21:46,037 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2018-11-28 12:21:46,058 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 12:21:46,059 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:21:46,059 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:21:46,066 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 12:21:46,066 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:21:46,066 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 12:21:46,066 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states. [2018-11-28 12:21:46,067 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 12:21:46,067 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:21:46,068 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:21:46,068 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 12:21:46,068 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:21:46,075 INFO L794 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 4#L16true call main_#t~ret3 := mc91(main_~x~0);< 5#mc91ENTRYtrue [2018-11-28 12:21:46,075 INFO L796 eck$LassoCheckResult]: Loop: 5#mc91ENTRYtrue ~n := #in~n; 9#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 5#mc91ENTRYtrue [2018-11-28 12:21:46,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1008, now seen corresponding path program 1 times [2018-11-28 12:21:46,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:46,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:46,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:46,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash 36877, now seen corresponding path program 1 times [2018-11-28 12:21:46,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:46,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:46,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:46,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash 30036414, now seen corresponding path program 1 times [2018-11-28 12:21:46,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:46,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:46,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:46,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,286 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:21:46,287 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:21:46,288 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:21:46,288 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:21:46,288 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:21:46,288 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:46,288 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:21:46,288 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:21:46,288 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-28 12:21:46,289 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:21:46,289 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:21:46,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,363 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:21:46,364 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:46,368 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:46,368 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:46,392 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:21:46,392 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:21:46,421 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 12:21:46,422 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:21:46,422 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:21:46,422 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:21:46,422 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:21:46,423 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:21:46,423 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:46,423 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:21:46,423 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:21:46,423 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-28 12:21:46,423 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:21:46,423 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:21:46,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,472 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:21:46,475 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:21:46,476 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 [2018-11-28 12:21:46,477 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:21:46,477 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:21:46,478 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:21:46,478 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:21:46,478 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:21:46,480 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:21:46,480 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:21:46,487 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:21:46,493 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 12:21:46,493 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:21:46,495 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:21:46,495 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:21:46,496 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:21:46,496 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2018-11-28 12:21:46,497 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:21:46,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:21:46,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:21:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:21:46,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:21:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:21:46,609 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 [2018-11-28 12:21:46,610 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states. Second operand 4 states. [2018-11-28 12:21:46,689 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states.. Second operand 4 states. Result 31 states and 38 transitions. Complement of second has 12 states. [2018-11-28 12:21:46,690 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 [2018-11-28 12:21:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 12:21:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-11-28 12:21:46,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2018-11-28 12:21:46,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:21:46,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2018-11-28 12:21:46,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:21:46,694 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2018-11-28 12:21:46,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:21:46,695 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 38 transitions. [2018-11-28 12:21:46,697 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 12:21:46,703 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 18 states and 24 transitions. [2018-11-28 12:21:46,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-11-28 12:21:46,704 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-11-28 12:21:46,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2018-11-28 12:21:46,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:21:46,705 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2018-11-28 12:21:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2018-11-28 12:21:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2018-11-28 12:21:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-28 12:21:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2018-11-28 12:21:46,730 INFO L728 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-11-28 12:21:46,730 INFO L608 BuchiCegarLoop]: Abstraction has 16 states and 20 transitions. [2018-11-28 12:21:46,730 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 12:21:46,730 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 20 transitions. [2018-11-28 12:21:46,731 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-28 12:21:46,731 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:21:46,731 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:21:46,732 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:21:46,732 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-11-28 12:21:46,732 INFO L794 eck$LassoCheckResult]: Stem: 100#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 96#L16 call main_#t~ret3 := mc91(main_~x~0);< 101#mc91ENTRY ~n := #in~n; 105#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 107#mc91ENTRY ~n := #in~n; 103#L10 assume ~n > 100;#res := ~n - 10; 104#mc91FINAL assume true; 102#mc91EXIT >#19#return; 97#L11-1 [2018-11-28 12:21:46,732 INFO L796 eck$LassoCheckResult]: Loop: 97#L11-1 call #t~ret1 := mc91(#t~ret0);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume !(~n > 100); 95#L11 call #t~ret0 := mc91(11 + ~n);< 106#mc91ENTRY ~n := #in~n; 109#L10 assume ~n > 100;#res := ~n - 10; 99#mc91FINAL assume true; 108#mc91EXIT >#19#return; 97#L11-1 [2018-11-28 12:21:46,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1934452539, now seen corresponding path program 1 times [2018-11-28 12:21:46,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:46,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:46,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:46,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,743 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 1 times [2018-11-28 12:21:46,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:46,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:46,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:46,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 418213862, now seen corresponding path program 1 times [2018-11-28 12:21:46,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:46,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:46,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:46,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:46,843 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:21:46,843 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:21:46,843 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:21:46,843 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:21:46,843 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:21:46,844 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:46,844 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:21:46,844 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:21:46,844 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-28 12:21:46,844 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:21:46,844 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:21:46,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:46,891 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:21:46,891 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:46,895 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:46,895 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:21:46,898 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:21:46,898 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:46,922 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:46,922 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:21:46,924 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:21:46,924 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:46,947 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:46,947 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:46,970 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:21:46,970 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:21:59,000 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-11-28 12:21:59,003 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:21:59,003 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:21:59,003 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:21:59,003 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:21:59,004 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:21:59,004 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:59,004 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:21:59,004 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:21:59,004 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-28 12:21:59,004 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:21:59,004 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:21:59,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,008 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,053 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:21:59,053 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:21:59,053 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 [2018-11-28 12:21:59,054 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:21:59,054 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:21:59,058 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:21:59,058 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:21:59,059 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:21:59,059 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:21:59,059 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:21:59,061 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:21:59,061 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 [2018-11-28 12:21:59,061 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:21:59,061 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:21:59,062 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:21:59,062 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:21:59,062 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:21:59,062 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:21:59,062 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:21:59,063 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:21:59,064 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 [2018-11-28 12:21:59,064 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:21:59,064 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:21:59,064 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:21:59,064 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:21:59,065 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:21:59,065 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:21:59,066 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:21:59,071 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:21:59,074 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 12:21:59,075 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:21:59,075 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:21:59,075 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:21:59,075 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:21:59,075 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-11-28 12:21:59,076 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:21:59,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:21:59,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:21:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:21:59,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:21:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:21:59,235 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-28 12:21:59,235 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6 Second operand 9 states. [2018-11-28 12:21:59,395 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 20 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 50 states and 72 transitions. Complement of second has 32 states. [2018-11-28 12:21:59,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-28 12:21:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-28 12:21:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-11-28 12:21:59,398 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 8 letters. [2018-11-28 12:21:59,399 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:21:59,399 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 17 letters. Loop has 8 letters. [2018-11-28 12:21:59,399 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:21:59,400 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 9 letters. Loop has 16 letters. [2018-11-28 12:21:59,400 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:21:59,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 72 transitions. [2018-11-28 12:21:59,403 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-11-28 12:21:59,405 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 41 states and 61 transitions. [2018-11-28 12:21:59,405 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-28 12:21:59,405 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-11-28 12:21:59,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 61 transitions. [2018-11-28 12:21:59,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:21:59,405 INFO L705 BuchiCegarLoop]: Abstraction has 41 states and 61 transitions. [2018-11-28 12:21:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 61 transitions. [2018-11-28 12:21:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2018-11-28 12:21:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 12:21:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2018-11-28 12:21:59,409 INFO L728 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2018-11-28 12:21:59,409 INFO L608 BuchiCegarLoop]: Abstraction has 35 states and 50 transitions. [2018-11-28 12:21:59,409 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 12:21:59,410 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 35 states and 50 transitions. [2018-11-28 12:21:59,410 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-11-28 12:21:59,410 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:21:59,410 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:21:59,411 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:21:59,411 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:21:59,411 INFO L794 eck$LassoCheckResult]: Stem: 288#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 283#L16 call main_#t~ret3 := mc91(main_~x~0);< 289#mc91ENTRY ~n := #in~n; 295#L10 assume !(~n > 100); 284#L11 call #t~ret0 := mc91(11 + ~n);< 297#mc91ENTRY ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 306#mc91FINAL assume true; 305#mc91EXIT >#19#return; 277#L11-1 call #t~ret1 := mc91(#t~ret0);< 292#mc91ENTRY ~n := #in~n; 309#L10 assume !(~n > 100); 294#L11 [2018-11-28 12:21:59,411 INFO L796 eck$LassoCheckResult]: Loop: 294#L11 call #t~ret0 := mc91(11 + ~n);< 296#mc91ENTRY ~n := #in~n; 293#L10 assume !(~n > 100); 294#L11 [2018-11-28 12:21:59,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 595607827, now seen corresponding path program 2 times [2018-11-28 12:21:59,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:59,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:59,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:59,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:21:59,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:59,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 47317, now seen corresponding path program 2 times [2018-11-28 12:21:59,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:59,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:59,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:21:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:21:59,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:21:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1242891907, now seen corresponding path program 3 times [2018-11-28 12:21:59,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:21:59,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:21:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:59,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:21:59,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:21:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:21:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:21:59,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:21:59,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-28 12:21:59,505 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:21:59,505 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:21:59,505 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:21:59,505 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:21:59,505 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:21:59,505 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:59,505 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:21:59,505 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:21:59,506 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-28 12:21:59,506 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:21:59,506 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:21:59,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:21:59,531 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:21:59,531 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:59,539 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:59,539 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:21:59,542 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:21:59,543 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:59,561 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:59,561 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:21:59,563 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:21:59,563 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:21:59,578 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:21:59,578 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:21:59,598 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:21:59,598 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:11,621 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-11-28 12:22:11,623 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:22:11,624 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:22:11,624 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:22:11,624 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:22:11,624 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:22:11,624 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:22:11,624 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:22:11,624 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:22:11,624 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-28 12:22:11,625 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:22:11,625 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:22:11,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:11,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:11,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:11,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:11,649 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:22:11,649 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:22:11,650 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 [2018-11-28 12:22:11,650 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:11,650 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:11,650 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:11,650 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:11,650 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:11,651 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:11,651 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:11,652 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:22:11,652 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 [2018-11-28 12:22:11,652 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:11,653 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:11,653 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:11,653 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:11,653 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:11,653 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:11,653 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:11,654 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:22:11,657 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 [2018-11-28 12:22:11,657 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:11,657 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:11,657 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:11,657 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:11,657 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:11,658 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:11,658 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:11,660 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:22:11,662 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 12:22:11,662 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:22:11,662 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:22:11,662 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:22:11,662 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:22:11,662 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2018-11-28 12:22:11,662 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:22:11,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:11,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:11,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:22:11,721 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 [2018-11-28 12:22:11,721 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-11-28 12:22:11,769 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2018-11-28 12:22:11,769 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 [2018-11-28 12:22:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:22:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-11-28 12:22:11,770 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-28 12:22:11,770 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:11,770 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:22:11,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:11,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:11,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:22:11,823 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 [2018-11-28 12:22:11,823 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-11-28 12:22:11,871 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 42 states and 58 transitions. Complement of second has 13 states. [2018-11-28 12:22:11,872 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 [2018-11-28 12:22:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:22:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 10 transitions. [2018-11-28 12:22:11,872 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 10 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-28 12:22:11,872 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:11,873 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:22:11,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:11,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:11,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:22:11,964 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 [2018-11-28 12:22:11,964 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-11-28 12:22:12,022 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 35 states and 50 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 70 states and 99 transitions. Complement of second has 16 states. [2018-11-28 12:22:12,023 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 [2018-11-28 12:22:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:22:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2018-11-28 12:22:12,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-28 12:22:12,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:12,024 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 15 letters. Loop has 3 letters. [2018-11-28 12:22:12,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:12,024 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 12 letters. Loop has 6 letters. [2018-11-28 12:22:12,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:12,024 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 70 states and 99 transitions. [2018-11-28 12:22:12,026 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-28 12:22:12,027 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 70 states to 47 states and 73 transitions. [2018-11-28 12:22:12,028 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-28 12:22:12,028 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-11-28 12:22:12,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 73 transitions. [2018-11-28 12:22:12,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:22:12,028 INFO L705 BuchiCegarLoop]: Abstraction has 47 states and 73 transitions. [2018-11-28 12:22:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 73 transitions. [2018-11-28 12:22:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2018-11-28 12:22:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-28 12:22:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2018-11-28 12:22:12,032 INFO L728 BuchiCegarLoop]: Abstraction has 41 states and 59 transitions. [2018-11-28 12:22:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:22:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:22:12,034 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand 8 states. [2018-11-28 12:22:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:22:12,100 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2018-11-28 12:22:12,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:22:12,100 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2018-11-28 12:22:12,102 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-28 12:22:12,104 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 57 states and 74 transitions. [2018-11-28 12:22:12,104 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2018-11-28 12:22:12,104 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2018-11-28 12:22:12,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 74 transitions. [2018-11-28 12:22:12,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:22:12,105 INFO L705 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-11-28 12:22:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 74 transitions. [2018-11-28 12:22:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-11-28 12:22:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-28 12:22:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2018-11-28 12:22:12,109 INFO L728 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2018-11-28 12:22:12,109 INFO L608 BuchiCegarLoop]: Abstraction has 56 states and 73 transitions. [2018-11-28 12:22:12,109 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 12:22:12,110 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 73 transitions. [2018-11-28 12:22:12,111 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-28 12:22:12,111 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:22:12,111 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:22:12,112 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-28 12:22:12,112 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2018-11-28 12:22:12,112 INFO L794 eck$LassoCheckResult]: Stem: 814#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 815#L16 call main_#t~ret3 := mc91(main_~x~0);< 816#mc91ENTRY ~n := #in~n; 842#L10 assume !(~n > 100); 834#L11 call #t~ret0 := mc91(11 + ~n);< 838#mc91ENTRY ~n := #in~n; 840#L10 assume !(~n > 100); 835#L11 call #t~ret0 := mc91(11 + ~n);< 837#mc91ENTRY ~n := #in~n; 841#L10 assume ~n > 100;#res := ~n - 10; 839#mc91FINAL assume true; 836#mc91EXIT >#19#return; 804#L11-1 call #t~ret1 := mc91(#t~ret0);< 821#mc91ENTRY ~n := #in~n; 855#L10 assume ~n > 100;#res := ~n - 10; 853#mc91FINAL assume true; 851#mc91EXIT >#21#return; 811#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 848#mc91FINAL assume true; 847#mc91EXIT >#19#return; 809#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY [2018-11-28 12:22:12,112 INFO L796 eck$LassoCheckResult]: Loop: 846#mc91ENTRY ~n := #in~n; 843#L10 assume !(~n > 100); 818#L11 call #t~ret0 := mc91(11 + ~n);< 827#mc91ENTRY ~n := #in~n; 824#L10 assume !(~n > 100); 817#L11 call #t~ret0 := mc91(11 + ~n);< 828#mc91ENTRY ~n := #in~n; 822#L10 assume ~n > 100;#res := ~n - 10; 823#mc91FINAL assume true; 857#mc91EXIT >#19#return; 805#L11-1 call #t~ret1 := mc91(#t~ret0);< 819#mc91ENTRY ~n := #in~n; 844#L10 assume ~n > 100;#res := ~n - 10; 845#mc91FINAL assume true; 849#mc91EXIT >#21#return; 811#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 848#mc91FINAL assume true; 847#mc91EXIT >#19#return; 810#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY [2018-11-28 12:22:12,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash -104606680, now seen corresponding path program 1 times [2018-11-28 12:22:12,112 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:22:12,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:22:12,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:12,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:22:12,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:22:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:22:12,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash -735472521, now seen corresponding path program 1 times [2018-11-28 12:22:12,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:22:12,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:22:12,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:12,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:22:12,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:22:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:22:12,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:12,136 INFO L82 PathProgramCache]: Analyzing trace with hash -726341392, now seen corresponding path program 2 times [2018-11-28 12:22:12,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:22:12,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:22:12,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:12,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:22:12,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-28 12:22:12,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:22:12,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:22:12,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:22:12,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:22:12,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:22:12,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-28 12:22:12,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:22:12,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 12:22:12,346 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:22:12,346 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:22:12,346 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:22:12,346 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:22:12,346 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:22:12,346 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:22:12,346 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:22:12,346 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:22:12,346 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-28 12:22:12,346 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:22:12,346 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:22:12,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,377 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:22:12,377 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:12,387 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:22:12,387 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:12,390 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:22:12,390 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:22:12,416 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:22:12,416 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:12,418 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:22:12,418 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:12,434 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:22:12,434 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:12,435 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:22:12,436 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:12,453 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:22:12,453 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:12,478 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:22:12,478 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:12,505 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 12:22:12,507 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:22:12,507 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:22:12,507 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:22:12,507 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:22:12,507 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:22:12,507 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:22:12,507 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:22:12,507 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:22:12,507 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-28 12:22:12,507 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:22:12,507 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:22:12,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:12,543 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:22:12,543 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:22:12,544 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 [2018-11-28 12:22:12,544 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:12,544 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:12,544 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:12,544 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:12,545 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:12,545 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:12,545 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:12,546 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:22:12,546 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 [2018-11-28 12:22:12,546 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:12,546 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:12,547 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:12,547 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:12,547 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:12,547 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:12,547 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:12,548 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:22:12,548 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 [2018-11-28 12:22:12,548 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:12,548 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:12,549 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:12,549 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:12,549 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:12,549 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:12,549 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:12,550 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:22:12,550 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 [2018-11-28 12:22:12,550 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:12,550 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:12,551 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:12,551 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:12,551 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:12,551 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:12,551 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:12,553 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:22:12,555 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 12:22:12,555 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:22:12,555 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:22:12,555 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:22:12,555 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:22:12,555 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2018-11-28 12:22:12,556 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:22:12,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:12,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:12,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 12:22:12,720 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2018-11-28 12:22:12,720 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-11-28 12:22:12,981 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2018-11-28 12:22:12,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2018-11-28 12:22:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-28 12:22:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2018-11-28 12:22:12,983 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2018-11-28 12:22:12,983 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:12,983 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:22:12,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:13,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:13,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 12:22:13,143 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2018-11-28 12:22:13,143 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-11-28 12:22:13,416 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 124 states and 149 transitions. Complement of second has 47 states. [2018-11-28 12:22:13,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2018-11-28 12:22:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-28 12:22:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 33 transitions. [2018-11-28 12:22:13,417 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 33 transitions. Stem has 21 letters. Loop has 19 letters. [2018-11-28 12:22:13,417 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:13,417 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:22:13,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:13,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:13,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 12:22:13,575 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 10 loop predicates [2018-11-28 12:22:13,575 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-11-28 12:22:14,109 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 73 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 430 states and 530 transitions. Complement of second has 216 states. [2018-11-28 12:22:14,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 2 stem states 17 non-accepting loop states 1 accepting loop states [2018-11-28 12:22:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-28 12:22:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 48 transitions. [2018-11-28 12:22:14,111 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 19 letters. [2018-11-28 12:22:14,111 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:14,111 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 40 letters. Loop has 19 letters. [2018-11-28 12:22:14,112 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:14,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 48 transitions. Stem has 21 letters. Loop has 38 letters. [2018-11-28 12:22:14,112 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:14,112 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 530 transitions. [2018-11-28 12:22:14,119 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2018-11-28 12:22:14,123 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 202 states and 268 transitions. [2018-11-28 12:22:14,124 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2018-11-28 12:22:14,124 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2018-11-28 12:22:14,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 202 states and 268 transitions. [2018-11-28 12:22:14,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:22:14,125 INFO L705 BuchiCegarLoop]: Abstraction has 202 states and 268 transitions. [2018-11-28 12:22:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states and 268 transitions. [2018-11-28 12:22:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2018-11-28 12:22:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-28 12:22:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2018-11-28 12:22:14,135 INFO L728 BuchiCegarLoop]: Abstraction has 156 states and 197 transitions. [2018-11-28 12:22:14,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:22:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:22:14,136 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand 9 states. [2018-11-28 12:22:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:22:14,269 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2018-11-28 12:22:14,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:22:14,269 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 158 states and 187 transitions. [2018-11-28 12:22:14,271 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-28 12:22:14,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 158 states to 103 states and 122 transitions. [2018-11-28 12:22:14,273 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2018-11-28 12:22:14,273 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 75 [2018-11-28 12:22:14,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 122 transitions. [2018-11-28 12:22:14,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:22:14,274 INFO L705 BuchiCegarLoop]: Abstraction has 103 states and 122 transitions. [2018-11-28 12:22:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states and 122 transitions. [2018-11-28 12:22:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-11-28 12:22:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-28 12:22:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-11-28 12:22:14,280 INFO L728 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-11-28 12:22:14,280 INFO L608 BuchiCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-11-28 12:22:14,280 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-28 12:22:14,280 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 99 states and 118 transitions. [2018-11-28 12:22:14,282 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-28 12:22:14,282 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:22:14,282 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:22:14,283 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1] [2018-11-28 12:22:14,283 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-11-28 12:22:14,283 INFO L794 eck$LassoCheckResult]: Stem: 2791#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 2792#L16 call main_#t~ret3 := mc91(main_~x~0);< 2793#mc91ENTRY ~n := #in~n; 2835#L10 assume !(~n > 100); 2810#L11 call #t~ret0 := mc91(11 + ~n);< 2811#mc91ENTRY ~n := #in~n; 2829#L10 assume !(~n > 100); 2823#L11 call #t~ret0 := mc91(11 + ~n);< 2827#mc91ENTRY ~n := #in~n; 2830#L10 assume ~n > 100;#res := ~n - 10; 2828#mc91FINAL assume true; 2826#mc91EXIT >#19#return; 2822#L11-1 call #t~ret1 := mc91(#t~ret0);< 2825#mc91ENTRY ~n := #in~n; 2852#L10 assume ~n > 100;#res := ~n - 10; 2844#mc91FINAL assume true; 2843#mc91EXIT >#21#return; 2841#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2840#mc91FINAL assume true; 2839#mc91EXIT >#19#return; 2831#L11-1 call #t~ret1 := mc91(#t~ret0);< 2838#mc91ENTRY ~n := #in~n; 2836#L10 assume !(~n > 100); 2803#L11 call #t~ret0 := mc91(11 + ~n);< 2812#mc91ENTRY ~n := #in~n; 2802#L10 assume !(~n > 100); 2795#L11 call #t~ret0 := mc91(11 + ~n);< 2834#mc91ENTRY ~n := #in~n; 2883#L10 assume ~n > 100;#res := ~n - 10; 2882#mc91FINAL assume true; 2794#mc91EXIT >#19#return; 2796#L11-1 [2018-11-28 12:22:14,283 INFO L796 eck$LassoCheckResult]: Loop: 2796#L11-1 call #t~ret1 := mc91(#t~ret0);< 2804#mc91ENTRY ~n := #in~n; 2819#L10 assume !(~n > 100); 2808#L11 call #t~ret0 := mc91(11 + ~n);< 2809#mc91ENTRY ~n := #in~n; 2881#L10 assume ~n > 100;#res := ~n - 10; 2880#mc91FINAL assume true; 2879#mc91EXIT >#19#return; 2796#L11-1 [2018-11-28 12:22:14,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1788916079, now seen corresponding path program 3 times [2018-11-28 12:22:14,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:22:14,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:22:14,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:14,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:22:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-28 12:22:14,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:22:14,338 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:14,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:22:14,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 12:22:14,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:22:14,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:22:14,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:22:14,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2018-11-28 12:22:14,384 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 12:22:14,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash 938335010, now seen corresponding path program 2 times [2018-11-28 12:22:14,384 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:22:14,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:22:14,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:14,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:22:14,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:22:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:22:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:22:14,436 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:22:14,436 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:22:14,436 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:22:14,436 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:22:14,436 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:22:14,436 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:22:14,436 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:22:14,436 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:22:14,436 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-28 12:22:14,436 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:22:14,436 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:22:14,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:14,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:14,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:14,464 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:22:14,464 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:14,471 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:22:14,471 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:14,476 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:22:14,476 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:14,492 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:22:14,492 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3f9052ed-7c0f-4b1a-9932-cded074fe876/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 [2018-11-28 12:22:14,511 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:22:14,511 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:22:26,539 INFO L450 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-11-28 12:22:26,542 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:22:26,542 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:22:26,542 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:22:26,542 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:22:26,542 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:22:26,542 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:22:26,542 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:22:26,542 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:22:26,542 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-28 12:22:26,542 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:22:26,542 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:22:26,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:26,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:26,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:22:26,565 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:22:26,565 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:22:26,566 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 [2018-11-28 12:22:26,566 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:26,566 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:26,566 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:26,567 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:26,567 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:26,567 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:26,567 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:26,568 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:22:26,568 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 [2018-11-28 12:22:26,568 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:22:26,568 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:22:26,568 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:22:26,568 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:22:26,569 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:22:26,569 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:22:26,569 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:22:26,572 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:22:26,574 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 12:22:26,574 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:22:26,574 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:22:26,574 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:22:26,574 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:22:26,574 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-11-28 12:22:26,575 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:22:26,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:26,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:26,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:22:26,671 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-28 12:22:26,671 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-11-28 12:22:26,787 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2018-11-28 12:22:26,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-28 12:22:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-28 12:22:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-11-28 12:22:26,789 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2018-11-28 12:22:26,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:26,790 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:22:26,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:26,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:26,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:22:26,894 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-28 12:22:26,895 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-11-28 12:22:27,008 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 138 states and 160 transitions. Complement of second has 24 states. [2018-11-28 12:22:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-28 12:22:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-28 12:22:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-11-28 12:22:27,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 16 transitions. Stem has 31 letters. Loop has 8 letters. [2018-11-28 12:22:27,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:27,011 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:22:27,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:22:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:27,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:22:27,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:22:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:22:27,110 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 7 loop predicates [2018-11-28 12:22:27,110 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-11-28 12:22:27,244 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 99 states and 118 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 180 states and 210 transitions. Complement of second has 27 states. [2018-11-28 12:22:27,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-28 12:22:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-28 12:22:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2018-11-28 12:22:27,245 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 8 letters. [2018-11-28 12:22:27,245 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:27,246 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 39 letters. Loop has 8 letters. [2018-11-28 12:22:27,246 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:27,246 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 31 letters. Loop has 16 letters. [2018-11-28 12:22:27,246 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:22:27,246 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 210 transitions. [2018-11-28 12:22:27,247 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 12:22:27,248 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2018-11-28 12:22:27,248 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 12:22:27,248 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 12:22:27,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 12:22:27,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 12:22:27,248 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:22:27,248 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:22:27,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:22:27,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:22:27,249 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 9 states. [2018-11-28 12:22:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:22:27,249 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-11-28 12:22:27,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 12:22:27,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-11-28 12:22:27,249 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 12:22:27,249 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:22:27,249 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 12:22:27,249 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 12:22:27,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 12:22:27,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 12:22:27,250 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:22:27,250 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:22:27,250 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:22:27,250 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-28 12:22:27,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:22:27,250 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 12:22:27,250 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-28 12:22:27,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 12:22:27 BoogieIcfgContainer [2018-11-28 12:22:27,255 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-28 12:22:27,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:22:27,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:22:27,255 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:22:27,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:21:45" (3/4) ... [2018-11-28 12:22:27,258 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 12:22:27,258 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:22:27,259 INFO L168 Benchmark]: Toolchain (without parser) took 41597.90 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 316.1 MB). Free memory was 962.4 MB in the beginning and 1.3 GB in the end (delta: -332.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:22:27,260 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:22:27,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.82 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:22:27,261 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:22:27,261 INFO L168 Benchmark]: Boogie Preprocessor took 9.74 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:22:27,261 INFO L168 Benchmark]: RCFGBuilder took 160.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -190.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-11-28 12:22:27,262 INFO L168 Benchmark]: BuchiAutomizer took 41275.24 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 155.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -154.0 MB). Peak memory consumption was 1.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:22:27,262 INFO L168 Benchmark]: Witness Printer took 2.81 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:22:27,265 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.82 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.74 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 160.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -190.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 41275.24 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 155.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -154.0 MB). Peak memory consumption was 1.2 MB. Max. memory is 11.5 GB. * Witness Printer took 2.81 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (3 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(n) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(n) + 90 and consists of 20 locations. One nondeterministic module has affine ranking function -2 * aux-mc91(n+11)-aux + 201 and consists of 8 locations. 3 modules have a trivial ranking function, the largest among these consists of 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 41.2s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 37.7s. Construction of modules took 0.4s. Büchi inclusion checks took 2.7s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 65 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 99 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 12/24 HoareTripleCheckerStatistics: 155 SDtfs, 246 SDslu, 186 SDs, 0 SdLazy, 832 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf92 smp94 dnf100 smp100 tf110 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 20ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 36.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...