./Ultimate.py --spec ../../sv-benchmarks/c/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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 0.1.23-1dbac8b [2018-10-27 06:11:01,728 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:11:01,729 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:11:01,742 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:11:01,742 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:11:01,743 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:11:01,744 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:11:01,745 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:11:01,746 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:11:01,747 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:11:01,747 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:11:01,748 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:11:01,749 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:11:01,750 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:11:01,750 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:11:01,751 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:11:01,752 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:11:01,754 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:11:01,755 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:11:01,757 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:11:01,757 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:11:01,758 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:11:01,760 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:11:01,761 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:11:01,761 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:11:01,762 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:11:01,763 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:11:01,763 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:11:01,764 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:11:01,765 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:11:01,766 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:11:01,766 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:11:01,766 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:11:01,766 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:11:01,767 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:11:01,768 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:11:01,769 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-10-27 06:11:01,781 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:11:01,781 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:11:01,782 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 06:11:01,782 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 06:11:01,782 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 06:11:01,783 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-10-27 06:11:01,783 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-10-27 06:11:01,783 INFO L133 SettingsManager]: * Use old map elimination=false [2018-10-27 06:11:01,783 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-10-27 06:11:01,783 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-10-27 06:11:01,783 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-10-27 06:11:01,784 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:11:01,784 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 06:11:01,784 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:11:01,785 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:11:01,785 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-10-27 06:11:01,785 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-10-27 06:11:01,786 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-10-27 06:11:01,786 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:11:01,786 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-10-27 06:11:01,786 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-10-27 06:11:01,786 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:11:01,786 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:11:01,787 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-10-27 06:11:01,787 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:11:01,787 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 06:11:01,787 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-10-27 06:11:01,788 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-27 06:11:01,788 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:01,816 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:11:01,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:11:01,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:11:01,830 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:11:01,831 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:11:01,831 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-10-27 06:11:01,880 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/data/3e9b5ad5e/55077af23cc44a588317ebfb042268e3/FLAGa5040e87f [2018-10-27 06:11:02,259 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:11:02,260 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-10-27 06:11:02,266 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/data/3e9b5ad5e/55077af23cc44a588317ebfb042268e3/FLAGa5040e87f [2018-10-27 06:11:02,286 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/data/3e9b5ad5e/55077af23cc44a588317ebfb042268e3 [2018-10-27 06:11:02,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:11:02,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 06:11:02,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:11:02,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:11:02,299 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:11:02,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a464bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02, skipping insertion in model container [2018-10-27 06:11:02,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:11:02,328 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:11:02,440 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:11:02,443 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:11:02,455 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:11:02,467 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:11:02,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02 WrapperNode [2018-10-27 06:11:02,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:11:02,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:11:02,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:11:02,469 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:11:02,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:11:02,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:11:02,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:11:02,495 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:11:02,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... [2018-10-27 06:11:02,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:11:02,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:11:02,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:11:02,510 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:11:02,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:02,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:11:02,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:11:02,649 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2018-10-27 06:11:02,649 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2018-10-27 06:11:02,914 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:11:02,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:02 BoogieIcfgContainer [2018-10-27 06:11:02,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:11:02,916 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-10-27 06:11:02,916 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-10-27 06:11:02,920 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-10-27 06:11:02,921 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:11:02,921 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.10 06:11:02" (1/3) ... [2018-10-27 06:11:02,922 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@57a9d072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:11:02, skipping insertion in model container [2018-10-27 06:11:02,922 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:11:02,923 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:02" (2/3) ... [2018-10-27 06:11:02,923 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@57a9d072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:11:02, skipping insertion in model container [2018-10-27 06:11:02,923 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:11:02,923 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:02" (3/3) ... [2018-10-27 06:11:02,927 INFO L375 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c [2018-10-27 06:11:02,982 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 06:11:02,983 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-10-27 06:11:02,983 INFO L375 BuchiCegarLoop]: Hoare is false [2018-10-27 06:11:02,983 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-10-27 06:11:02,984 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:11:02,984 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:11:02,984 INFO L379 BuchiCegarLoop]: Difference is false [2018-10-27 06:11:02,984 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:11:02,984 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-10-27 06:11:02,999 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2018-10-27 06:11:03,026 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:11:03,026 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:03,026 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:03,038 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:11:03,039 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:11:03,039 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-10-27 06:11:03,039 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2018-10-27 06:11:03,041 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:11:03,041 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:03,041 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:03,041 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:11:03,041 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:11:03,050 INFO L793 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 6#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 4#L16true call main_#t~ret3 := mc91(main_~x~0);< 5#mc91ENTRYtrue [2018-10-27 06:11:03,051 INFO L795 eck$LassoCheckResult]: Loop: 5#mc91ENTRYtrue ~n := #in~n; 10#L10true assume !(~n > 100); 12#L11true call #t~ret0 := mc91(~n + 11);< 5#mc91ENTRYtrue [2018-10-27 06:11:03,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash 29870, now seen corresponding path program 1 times [2018-10-27 06:11:03,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:03,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:03,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:03,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:03,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:03,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash 37870, now seen corresponding path program 1 times [2018-10-27 06:11:03,150 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:03,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:03,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:03,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:03,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:03,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:03,170 INFO L82 PathProgramCache]: Analyzing trace with hash 889865249, now seen corresponding path program 1 times [2018-10-27 06:11:03,170 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:03,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:03,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:03,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:03,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:03,363 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-27 06:11:03,423 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:03,424 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:03,425 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:03,425 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:03,425 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:03,425 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:03,425 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:03,425 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:03,426 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-10-27 06:11:03,426 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:03,426 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:03,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,614 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:03,615 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:03,618 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:03,619 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:03,639 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:03,639 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:03,678 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:11:03,679 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:03,679 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:03,679 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:03,679 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:03,679 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:03,679 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:03,679 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:03,679 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:03,680 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-10-27 06:11:03,680 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:03,680 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:03,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:03,839 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:03,844 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:03,845 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:03,846 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:03,847 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:03,847 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:03,847 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:03,847 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:03,850 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:03,850 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:03,858 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:03,863 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:03,863 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:11:03,865 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:03,865 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:03,866 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:03,866 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2018-10-27 06:11:03,867 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:03,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:03,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:03,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:04,093 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-10-27 06:11:04,094 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2018-10-27 06:11:04,307 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 4 states. Result 32 states and 39 transitions. Complement of second has 12 states. [2018-10-27 06:11:04,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-10-27 06:11:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-27 06:11:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2018-10-27 06:11:04,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2018-10-27 06:11:04,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:04,312 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2018-10-27 06:11:04,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:04,312 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2018-10-27 06:11:04,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:04,313 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2018-10-27 06:11:04,316 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:11:04,321 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 19 states and 25 transitions. [2018-10-27 06:11:04,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2018-10-27 06:11:04,322 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2018-10-27 06:11:04,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2018-10-27 06:11:04,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:04,324 INFO L705 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-10-27 06:11:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2018-10-27 06:11:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-27 06:11:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 06:11:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2018-10-27 06:11:04,345 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2018-10-27 06:11:04,345 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2018-10-27 06:11:04,345 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-10-27 06:11:04,345 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2018-10-27 06:11:04,346 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-10-27 06:11:04,346 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:04,346 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:04,347 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:04,347 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:04,347 INFO L793 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 99#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 100#L16 call main_#t~ret3 := mc91(main_~x~0);< 108#mc91ENTRY ~n := #in~n; 111#L10 assume !(~n > 100); 103#L11 call #t~ret0 := mc91(~n + 11);< 113#mc91ENTRY ~n := #in~n; 109#L10 assume ~n > 100;#res := ~n - 10; 110#mc91FINAL assume true; 106#mc91EXIT >#20#return; 104#L11-1 [2018-10-27 06:11:04,348 INFO L795 eck$LassoCheckResult]: Loop: 104#L11-1 call #t~ret1 := mc91(#t~ret0);< 112#mc91ENTRY ~n := #in~n; 115#L10 assume !(~n > 100); 102#L11 call #t~ret0 := mc91(~n + 11);< 112#mc91ENTRY ~n := #in~n; 115#L10 assume ~n > 100;#res := ~n - 10; 105#mc91FINAL assume true; 114#mc91EXIT >#20#return; 104#L11-1 [2018-10-27 06:11:04,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1612519912, now seen corresponding path program 1 times [2018-10-27 06:11:04,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:04,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:04,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:04,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:04,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:04,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 1 times [2018-10-27 06:11:04,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:04,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:04,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:04,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:04,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:04,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:04,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1110240905, now seen corresponding path program 1 times [2018-10-27 06:11:04,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:04,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:04,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:04,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:04,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:04,745 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 06:11:04,758 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:04,758 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:04,758 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:04,759 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:04,759 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:04,759 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:04,759 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:04,759 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:04,759 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-10-27 06:11:04,759 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:04,760 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:04,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:04,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:04,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:04,868 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:04,868 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:04,871 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:04,872 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:04,876 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:04,876 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:04,894 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:04,895 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:04,904 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:04,904 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:04,926 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:04,926 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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) [2018-10-27 06:11:04,986 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:04,986 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:17,029 INFO L448 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-10-27 06:11:17,032 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:17,032 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:17,032 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:17,032 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:17,032 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:17,032 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:17,033 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:17,033 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:17,033 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-10-27 06:11:17,033 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:17,033 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:17,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:17,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:17,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:17,159 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:17,160 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:17,160 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:17,161 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:17,161 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:17,161 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:17,161 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:17,161 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:17,162 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:17,162 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:17,163 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:17,164 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:17,167 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:17,167 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:17,167 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:17,167 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:17,167 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:17,168 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:17,168 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:17,169 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:17,169 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:17,169 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:17,169 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:17,170 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:17,170 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:17,170 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:17,172 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:17,172 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:17,178 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:17,194 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:17,194 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:11:17,194 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:17,195 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:17,195 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:17,195 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-10-27 06:11:17,195 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:17,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:17,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:17,460 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-10-27 06:11:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:17,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:17,592 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 [2018-10-27 06:11:17,592 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 9 states. [2018-10-27 06:11:18,206 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 51 states and 73 transitions. Complement of second has 32 states. [2018-10-27 06:11:18,207 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 [2018-10-27 06:11:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-27 06:11:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-10-27 06:11:18,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2018-10-27 06:11:18,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:18,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2018-10-27 06:11:18,210 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:18,210 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2018-10-27 06:11:18,210 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:18,210 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2018-10-27 06:11:18,216 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-10-27 06:11:18,218 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2018-10-27 06:11:18,218 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-10-27 06:11:18,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-10-27 06:11:18,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2018-10-27 06:11:18,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:18,219 INFO L705 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2018-10-27 06:11:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2018-10-27 06:11:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2018-10-27 06:11:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-27 06:11:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2018-10-27 06:11:18,225 INFO L728 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2018-10-27 06:11:18,225 INFO L608 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2018-10-27 06:11:18,225 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-10-27 06:11:18,225 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2018-10-27 06:11:18,227 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2018-10-27 06:11:18,227 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:18,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:18,228 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:18,228 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-10-27 06:11:18,228 INFO L793 eck$LassoCheckResult]: Stem: 299#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 285#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 286#L16 call main_#t~ret3 := mc91(main_~x~0);< 300#mc91ENTRY ~n := #in~n; 303#L10 assume !(~n > 100); 289#L11 call #t~ret0 := mc91(~n + 11);< 308#mc91ENTRY ~n := #in~n; 309#L10 assume ~n > 100;#res := ~n - 10; 319#mc91FINAL assume true; 318#mc91EXIT >#20#return; 288#L11-1 call #t~ret1 := mc91(#t~ret0);< 306#mc91ENTRY ~n := #in~n; 320#L10 assume !(~n > 100); 302#L11 [2018-10-27 06:11:18,229 INFO L795 eck$LassoCheckResult]: Loop: 302#L11 call #t~ret0 := mc91(~n + 11);< 307#mc91ENTRY ~n := #in~n; 301#L10 assume !(~n > 100); 302#L11 [2018-10-27 06:11:18,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash -628486927, now seen corresponding path program 2 times [2018-10-27 06:11:18,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:18,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:18,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:18,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:18,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:18,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 48310, now seen corresponding path program 2 times [2018-10-27 06:11:18,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:18,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:18,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:18,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:11:18,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:18,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:18,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1491580474, now seen corresponding path program 3 times [2018-10-27 06:11:18,250 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:18,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:18,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:18,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:11:18,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 06:11:18,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:11:18,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-27 06:11:18,363 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:18,363 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:18,363 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:18,363 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:18,363 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:18,363 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:18,363 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:18,364 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:18,364 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-10-27 06:11:18,364 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:18,364 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:18,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:18,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:18,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:18,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:18,397 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:18,397 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:18,409 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:18,409 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:18,412 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:18,412 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:18,431 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:18,432 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:18,434 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:18,434 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:18,452 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:18,452 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:18,484 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:18,484 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:30,528 INFO L448 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-10-27 06:11:30,530 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:30,530 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:30,530 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:30,531 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:30,531 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:30,531 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:30,531 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:30,531 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:30,531 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-10-27 06:11:30,531 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:30,531 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:30,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:30,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:30,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:30,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:30,570 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:30,570 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:30,570 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:30,571 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:30,571 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:30,571 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:30,572 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:30,572 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:30,572 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:30,572 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:30,574 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:30,574 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:30,574 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:30,575 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:30,575 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:30,575 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:30,575 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:30,575 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:30,575 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:30,580 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:30,581 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:30,581 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:30,581 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:30,581 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:30,582 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:30,582 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:30,582 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:30,582 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:30,588 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:30,591 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:30,591 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:11:30,591 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:30,591 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:30,592 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:30,592 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2018-10-27 06:11:30,592 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:30,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:30,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:30,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:30,694 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-10-27 06:11:30,694 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-10-27 06:11:30,773 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2018-10-27 06:11:30,776 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 [2018-10-27 06:11:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:11:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2018-10-27 06:11:30,777 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2018-10-27 06:11:30,777 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:30,777 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:30,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:30,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:30,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:30,845 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-10-27 06:11:30,845 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-10-27 06:11:30,923 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2018-10-27 06:11:30,925 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 [2018-10-27 06:11:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:11:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2018-10-27 06:11:30,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2018-10-27 06:11:30,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:30,926 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:30,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:30,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:30,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:31,005 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-10-27 06:11:31,005 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2018-10-27 06:11:31,068 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 71 states and 100 transitions. Complement of second has 16 states. [2018-10-27 06:11:31,069 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 [2018-10-27 06:11:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:11:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2018-10-27 06:11:31,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2018-10-27 06:11:31,070 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:31,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2018-10-27 06:11:31,070 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:31,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2018-10-27 06:11:31,071 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:31,071 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2018-10-27 06:11:31,073 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-10-27 06:11:31,075 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2018-10-27 06:11:31,075 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-10-27 06:11:31,075 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2018-10-27 06:11:31,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2018-10-27 06:11:31,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:31,076 INFO L705 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2018-10-27 06:11:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2018-10-27 06:11:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2018-10-27 06:11:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 06:11:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2018-10-27 06:11:31,082 INFO L728 BuchiCegarLoop]: Abstraction has 42 states and 60 transitions. [2018-10-27 06:11:31,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 06:11:31,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-27 06:11:31,085 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 8 states. [2018-10-27 06:11:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:31,208 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2018-10-27 06:11:31,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 06:11:31,209 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2018-10-27 06:11:31,211 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-10-27 06:11:31,213 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2018-10-27 06:11:31,213 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2018-10-27 06:11:31,213 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-10-27 06:11:31,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2018-10-27 06:11:31,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:31,214 INFO L705 BuchiCegarLoop]: Abstraction has 58 states and 75 transitions. [2018-10-27 06:11:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2018-10-27 06:11:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-10-27 06:11:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-27 06:11:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2018-10-27 06:11:31,220 INFO L728 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-10-27 06:11:31,220 INFO L608 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-10-27 06:11:31,220 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-10-27 06:11:31,220 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2018-10-27 06:11:31,222 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-10-27 06:11:31,222 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:31,222 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:31,225 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-27 06:11:31,225 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2018-10-27 06:11:31,226 INFO L793 eck$LassoCheckResult]: Stem: 840#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 827#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 828#L16 call main_#t~ret3 := mc91(main_~x~0);< 841#mc91ENTRY ~n := #in~n; 844#L10 assume !(~n > 100); 845#L11 call #t~ret0 := mc91(~n + 11);< 861#mc91ENTRY ~n := #in~n; 864#L10 assume !(~n > 100); 859#L11 call #t~ret0 := mc91(~n + 11);< 862#mc91ENTRY ~n := #in~n; 865#L10 assume ~n > 100;#res := ~n - 10; 863#mc91FINAL assume true; 860#mc91EXIT >#20#return; 832#L11-1 call #t~ret1 := mc91(#t~ret0);< 847#mc91ENTRY ~n := #in~n; 842#L10 assume ~n > 100;#res := ~n - 10; 843#mc91FINAL assume true; 854#mc91EXIT >#22#return; 874#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 875#mc91FINAL assume true; 873#mc91EXIT >#20#return; 868#L11-1 call #t~ret1 := mc91(#t~ret0);< 872#mc91ENTRY [2018-10-27 06:11:31,226 INFO L795 eck$LassoCheckResult]: Loop: 872#mc91ENTRY ~n := #in~n; 866#L10 assume !(~n > 100); 836#L11 call #t~ret0 := mc91(~n + 11);< 851#mc91ENTRY ~n := #in~n; 853#L10 assume !(~n > 100); 837#L11 call #t~ret0 := mc91(~n + 11);< 852#mc91ENTRY ~n := #in~n; 882#L10 assume ~n > 100;#res := ~n - 10; 880#mc91FINAL assume true; 835#mc91EXIT >#20#return; 833#L11-1 call #t~ret1 := mc91(#t~ret0);< 846#mc91ENTRY ~n := #in~n; 870#L10 assume ~n > 100;#res := ~n - 10; 871#mc91FINAL assume true; 877#mc91EXIT >#22#return; 874#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 875#mc91FINAL assume true; 873#mc91EXIT >#20#return; 867#L11-1 call #t~ret1 := mc91(#t~ret0);< 872#mc91ENTRY [2018-10-27 06:11:31,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1678623115, now seen corresponding path program 1 times [2018-10-27 06:11:31,226 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:31,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:31,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:31,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:11:31,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:31,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2037590184, now seen corresponding path program 1 times [2018-10-27 06:11:31,241 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:31,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:31,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:31,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1698366862, now seen corresponding path program 2 times [2018-10-27 06:11:31,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:31,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:31,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:31,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:31,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-27 06:11:31,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:11:31,340 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:31,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:11:31,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 06:11:31,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:11:31,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-27 06:11:31,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:11:31,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-27 06:11:31,642 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 06:11:31,776 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:31,776 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:31,777 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:31,777 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:31,777 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:31,777 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:31,777 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:31,777 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:31,777 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-10-27 06:11:31,777 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:31,777 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:31,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:31,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:31,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:31,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:31,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:31,884 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:31,884 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:31,887 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:31,887 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:31,889 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:31,889 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:31,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:31,907 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:31,909 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:31,909 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:31,927 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:31,928 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:31,929 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:31,930 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:31,947 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:31,947 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:31,966 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:31,966 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:32,012 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:11:32,013 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:32,013 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:32,013 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:32,013 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:32,013 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:32,013 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:32,013 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:32,013 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:32,013 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-10-27 06:11:32,014 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:32,014 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:32,014 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:32,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:32,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:32,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:32,024 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:32,041 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:32,041 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:32,041 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:32,042 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:32,042 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:32,042 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:32,042 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:32,042 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:32,042 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:32,042 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:32,043 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:32,043 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:32,043 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:32,043 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:32,043 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:32,043 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:32,044 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:32,044 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:32,044 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:32,044 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:32,045 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:32,045 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:32,045 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:32,045 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:32,045 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:32,045 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:32,046 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:32,046 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:32,046 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:32,047 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:32,047 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:32,047 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:32,047 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:32,047 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:32,048 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:32,052 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:32,052 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:32,060 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:32,062 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:32,062 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:11:32,062 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:32,063 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:32,063 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:32,063 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2018-10-27 06:11:32,063 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:32,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:32,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:32,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 06:11:32,326 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 [2018-10-27 06:11:32,326 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-10-27 06:11:32,637 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2018-10-27 06:11:32,638 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 [2018-10-27 06:11:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-27 06:11:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2018-10-27 06:11:32,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2018-10-27 06:11:32,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:32,639 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:32,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:32,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:32,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 06:11:33,210 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 [2018-10-27 06:11:33,210 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-10-27 06:11:33,526 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2018-10-27 06:11:33,527 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 [2018-10-27 06:11:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-27 06:11:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2018-10-27 06:11:33,527 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2018-10-27 06:11:33,528 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:33,528 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:33,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:33,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:33,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 06:11:33,748 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 [2018-10-27 06:11:33,748 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2018-10-27 06:11:34,427 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 431 states and 531 transitions. Complement of second has 216 states. [2018-10-27 06:11:34,428 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 [2018-10-27 06:11:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-27 06:11:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 49 transitions. [2018-10-27 06:11:34,429 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2018-10-27 06:11:34,430 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:34,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2018-10-27 06:11:34,431 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:34,431 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2018-10-27 06:11:34,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:34,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 431 states and 531 transitions. [2018-10-27 06:11:34,444 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2018-10-27 06:11:34,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 431 states to 203 states and 269 transitions. [2018-10-27 06:11:34,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 95 [2018-10-27 06:11:34,449 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2018-10-27 06:11:34,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 269 transitions. [2018-10-27 06:11:34,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:34,450 INFO L705 BuchiCegarLoop]: Abstraction has 203 states and 269 transitions. [2018-10-27 06:11:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 269 transitions. [2018-10-27 06:11:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 157. [2018-10-27 06:11:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-27 06:11:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2018-10-27 06:11:34,465 INFO L728 BuchiCegarLoop]: Abstraction has 157 states and 198 transitions. [2018-10-27 06:11:34,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:11:34,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:11:34,465 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand 9 states. [2018-10-27 06:11:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:34,634 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2018-10-27 06:11:34,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 06:11:34,636 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 188 transitions. [2018-10-27 06:11:34,639 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-10-27 06:11:34,641 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 104 states and 123 transitions. [2018-10-27 06:11:34,641 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2018-10-27 06:11:34,641 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2018-10-27 06:11:34,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 123 transitions. [2018-10-27 06:11:34,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:34,642 INFO L705 BuchiCegarLoop]: Abstraction has 104 states and 123 transitions. [2018-10-27 06:11:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 123 transitions. [2018-10-27 06:11:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-10-27 06:11:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-27 06:11:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2018-10-27 06:11:34,649 INFO L728 BuchiCegarLoop]: Abstraction has 100 states and 119 transitions. [2018-10-27 06:11:34,649 INFO L608 BuchiCegarLoop]: Abstraction has 100 states and 119 transitions. [2018-10-27 06:11:34,649 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-10-27 06:11:34,650 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 100 states and 119 transitions. [2018-10-27 06:11:34,651 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-10-27 06:11:34,651 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:34,651 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:34,651 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2018-10-27 06:11:34,652 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:34,652 INFO L793 eck$LassoCheckResult]: Stem: 2842#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2828#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 2829#L16 call main_#t~ret3 := mc91(main_~x~0);< 2843#mc91ENTRY ~n := #in~n; 2864#L10 assume !(~n > 100); 2865#L11 call #t~ret0 := mc91(~n + 11);< 2866#mc91ENTRY ~n := #in~n; 2868#L10 assume !(~n > 100); 2867#L11 call #t~ret0 := mc91(~n + 11);< 2884#mc91ENTRY ~n := #in~n; 2887#L10 assume ~n > 100;#res := ~n - 10; 2886#mc91FINAL assume true; 2885#mc91EXIT >#20#return; 2880#L11-1 call #t~ret1 := mc91(#t~ret0);< 2883#mc91ENTRY ~n := #in~n; 2901#L10 assume ~n > 100;#res := ~n - 10; 2888#mc91FINAL assume true; 2879#mc91EXIT >#22#return; 2878#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2876#mc91FINAL assume true; 2875#mc91EXIT >#20#return; 2869#L11-1 call #t~ret1 := mc91(#t~ret0);< 2874#mc91ENTRY ~n := #in~n; 2872#L10 assume !(~n > 100); 2844#L11 call #t~ret0 := mc91(~n + 11);< 2853#mc91ENTRY ~n := #in~n; 2877#L10 assume !(~n > 100); 2837#L11 call #t~ret0 := mc91(~n + 11);< 2854#mc91ENTRY ~n := #in~n; 2927#L10 assume ~n > 100;#res := ~n - 10; 2926#mc91FINAL assume true; 2836#mc91EXIT >#20#return; 2838#L11-1 [2018-10-27 06:11:34,655 INFO L795 eck$LassoCheckResult]: Loop: 2838#L11-1 call #t~ret1 := mc91(#t~ret0);< 2845#mc91ENTRY ~n := #in~n; 2923#L10 assume !(~n > 100); 2849#L11 call #t~ret0 := mc91(~n + 11);< 2852#mc91ENTRY ~n := #in~n; 2848#L10 assume ~n > 100;#res := ~n - 10; 2850#mc91FINAL assume true; 2855#mc91EXIT >#20#return; 2838#L11-1 [2018-10-27 06:11:34,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1028640846, now seen corresponding path program 3 times [2018-10-27 06:11:34,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:34,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:34,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:34,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:11:34,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-10-27 06:11:34,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:11:34,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:34,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 06:11:34,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-27 06:11:34,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:11:34,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 06:11:34,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:11:34,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2018-10-27 06:11:34,876 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:11:34,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 2 times [2018-10-27 06:11:34,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:34,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:34,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:34,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:11:34,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:34,937 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:34,937 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:34,938 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:34,938 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:34,938 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:34,938 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:34,938 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:34,938 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:34,938 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-10-27 06:11:34,938 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:34,938 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:34,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:34,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:34,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:35,004 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:35,004 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:35,010 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:35,010 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:35,012 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:35,012 INFO L446 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_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:35,029 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:35,030 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_44bed983-07c9-41ec-a2a0-db3fa9fbb048/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 [2018-10-27 06:11:35,053 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:35,053 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:47,079 INFO L448 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2018-10-27 06:11:47,086 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:47,086 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:47,086 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:47,086 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:47,086 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:47,086 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:47,086 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:47,086 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:47,086 INFO L131 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-10-27 06:11:47,086 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:47,087 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:47,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:47,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:47,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:47,121 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:47,122 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:47,122 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:47,122 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:47,122 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:47,123 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:47,123 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:47,123 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:47,123 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:47,123 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:47,128 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:47,128 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:11:47,128 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:47,129 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:47,129 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:47,129 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:47,129 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:47,129 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:47,130 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:47,132 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:47,135 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:47,135 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-10-27 06:11:47,135 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:47,135 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:47,135 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:47,136 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2018-10-27 06:11:47,136 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:47,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:47,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:47,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:47,347 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 [2018-10-27 06:11:47,347 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-10-27 06:11:47,534 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 139 states and 161 transitions. Complement of second has 24 states. [2018-10-27 06:11:47,536 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 [2018-10-27 06:11:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-27 06:11:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-10-27 06:11:47,537 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 32 letters. Loop has 8 letters. [2018-10-27 06:11:47,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:47,537 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:47,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:47,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:47,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:47,701 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 [2018-10-27 06:11:47,701 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-10-27 06:11:47,853 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 139 states and 161 transitions. Complement of second has 24 states. [2018-10-27 06:11:47,856 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 [2018-10-27 06:11:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-27 06:11:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-10-27 06:11:47,857 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 32 letters. Loop has 8 letters. [2018-10-27 06:11:47,857 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:47,857 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:47,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:47,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:47,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:47,980 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 [2018-10-27 06:11:47,980 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24 Second operand 9 states. [2018-10-27 06:11:48,165 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 181 states and 211 transitions. Complement of second has 27 states. [2018-10-27 06:11:48,168 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 [2018-10-27 06:11:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-27 06:11:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 21 transitions. [2018-10-27 06:11:48,169 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 32 letters. Loop has 8 letters. [2018-10-27 06:11:48,169 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:48,169 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 40 letters. Loop has 8 letters. [2018-10-27 06:11:48,170 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:48,170 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 32 letters. Loop has 16 letters. [2018-10-27 06:11:48,170 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:48,171 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 181 states and 211 transitions. [2018-10-27 06:11:48,173 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:11:48,173 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 181 states to 0 states and 0 transitions. [2018-10-27 06:11:48,173 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:11:48,173 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:11:48,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:11:48,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:11:48,174 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:48,174 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:11:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:11:48,174 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 9 states. [2018-10-27 06:11:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:48,174 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-10-27 06:11:48,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 06:11:48,175 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-10-27 06:11:48,175 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:11:48,175 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 06:11:48,175 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:11:48,175 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:11:48,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:11:48,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:11:48,175 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:48,175 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:48,175 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:48,176 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-10-27 06:11:48,176 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-10-27 06:11:48,176 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:11:48,176 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-10-27 06:11:48,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.10 06:11:48 BoogieIcfgContainer [2018-10-27 06:11:48,185 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-10-27 06:11:48,186 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 06:11:48,186 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 06:11:48,186 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 06:11:48,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:02" (3/4) ... [2018-10-27 06:11:48,195 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 06:11:48,195 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 06:11:48,196 INFO L168 Benchmark]: Toolchain (without parser) took 45904.58 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 335.0 MB). Free memory was 960.7 MB in the beginning and 943.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 352.3 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:48,197 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:11:48,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.08 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:48,197 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.21 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:11:48,198 INFO L168 Benchmark]: Boogie Preprocessor took 14.78 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:48,198 INFO L168 Benchmark]: RCFGBuilder took 404.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -208.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:48,199 INFO L168 Benchmark]: BuchiAutomizer took 45269.90 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 166.2 MB). Free memory was 1.2 GB in the beginning and 950.5 MB in the end (delta: 205.1 MB). Peak memory consumption was 371.3 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:48,199 INFO L168 Benchmark]: Witness Printer took 9.54 ms. Allocated memory is still 1.4 GB. Free memory is still 943.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:11:48,206 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 175.08 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 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 26.21 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.78 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 404.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -208.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 45269.90 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 166.2 MB). Free memory was 1.2 GB in the beginning and 950.5 MB in the end (delta: 205.1 MB). Peak memory consumption was 371.3 MB. Max. memory is 11.5 GB. * Witness Printer took 9.54 ms. Allocated memory is still 1.4 GB. Free memory is still 943.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (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 45.2s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 39.4s. Construction of modules took 0.8s. Büchi inclusion checks took 4.7s. 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 100 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 12/24 HoareTripleCheckerStatistics: 168 SDtfs, 276 SDslu, 193 SDs, 0 SdLazy, 798 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s 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: 21ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 36.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...