./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/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 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:33:02,081 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:33:02,083 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:33:02,091 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:33:02,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:33:02,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:33:02,093 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:33:02,094 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:33:02,095 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:33:02,095 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:33:02,096 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:33:02,096 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:33:02,097 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:33:02,098 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:33:02,098 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:33:02,099 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:33:02,099 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:33:02,101 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:33:02,102 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:33:02,103 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:33:02,104 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:33:02,105 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:33:02,106 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:33:02,106 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:33:02,107 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:33:02,107 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:33:02,108 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:33:02,108 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:33:02,109 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:33:02,110 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:33:02,110 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:33:02,110 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:33:02,111 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:33:02,111 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:33:02,111 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:33:02,112 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:33:02,112 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-18 15:33:02,123 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:33:02,123 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:33:02,124 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:33:02,124 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:33:02,124 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 15:33:02,124 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 15:33:02,125 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 15:33:02,125 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 15:33:02,125 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 15:33:02,125 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 15:33:02,125 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 15:33:02,125 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:33:02,125 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:33:02,126 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 15:33:02,127 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:33:02,127 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 15:33:02,127 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:33:02,127 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:33:02,127 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 15:33:02,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:33:02,128 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 15:33:02,128 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 15:33:02,128 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 15:33:02,128 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_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/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 -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2018-11-18 15:33:02,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:33:02,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:33:02,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:33:02,163 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:33:02,163 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:33:02,163 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 15:33:02,200 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/data/2105f8cb0/93126cb89b96474b80024ddfb16b232c/FLAG86e729027 [2018-11-18 15:33:02,537 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:33:02,537 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 15:33:02,542 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/data/2105f8cb0/93126cb89b96474b80024ddfb16b232c/FLAG86e729027 [2018-11-18 15:33:02,552 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/data/2105f8cb0/93126cb89b96474b80024ddfb16b232c [2018-11-18 15:33:02,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:33:02,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:33:02,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:33:02,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:33:02,559 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:33:02,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab71cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02, skipping insertion in model container [2018-11-18 15:33:02,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:33:02,581 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:33:02,695 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:33:02,697 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:33:02,707 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:33:02,717 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:33:02,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02 WrapperNode [2018-11-18 15:33:02,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:33:02,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:33:02,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:33:02,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:33:02,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:33:02,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:33:02,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:33:02,745 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:33:02,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... [2018-11-18 15:33:02,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:33:02,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:33:02,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:33:02,762 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:33:02,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-18 15:33:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-18 15:33:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-18 15:33:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-18 15:33:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:33:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:33:03,025 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:33:03,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:33:03 BoogieIcfgContainer [2018-11-18 15:33:03,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:33:03,026 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 15:33:03,026 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 15:33:03,031 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 15:33:03,032 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 15:33:03,032 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 03:33:02" (1/3) ... [2018-11-18 15:33:03,034 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7f256275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 03:33:03, skipping insertion in model container [2018-11-18 15:33:03,034 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 15:33:03,034 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:33:02" (2/3) ... [2018-11-18 15:33:03,035 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7f256275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 03:33:03, skipping insertion in model container [2018-11-18 15:33:03,035 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 15:33:03,035 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:33:03" (3/3) ... [2018-11-18 15:33:03,036 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 15:33:03,094 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:33:03,095 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 15:33:03,095 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 15:33:03,095 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 15:33:03,095 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:33:03,095 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:33:03,095 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 15:33:03,095 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:33:03,095 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 15:33:03,105 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-11-18 15:33:03,126 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-18 15:33:03,126 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:33:03,127 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:33:03,134 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 15:33:03,134 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 15:33:03,134 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 15:33:03,135 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-11-18 15:33:03,137 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-18 15:33:03,138 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:33:03,138 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:33:03,138 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 15:33:03,138 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 15:33:03,146 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 23#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-18 15:33:03,147 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 21#L18true assume !(~j <= 0); 19#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2018-11-18 15:33:03,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,153 INFO L82 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2018-11-18 15:33:03,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:03,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:03,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:03,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 39868, now seen corresponding path program 1 times [2018-11-18 15:33:03,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:03,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1451963835, now seen corresponding path program 1 times [2018-11-18 15:33:03,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:03,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:03,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:03,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,322 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:33:03,323 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:33:03,323 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:33:03,323 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:33:03,323 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:33:03,323 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,324 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:33:03,324 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:33:03,324 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 15:33:03,324 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:33:03,324 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:33:03,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,409 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:33:03,410 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,418 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:03,418 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:03,428 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:03,428 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,447 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:03,447 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:03,450 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:03,450 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,469 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:03,469 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:03,471 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:03,471 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,490 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:03,490 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,513 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:33:03,513 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:03,534 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:33:03,535 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:33:03,535 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:33:03,535 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:33:03,535 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:33:03,535 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:33:03,536 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,536 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:33:03,536 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:33:03,536 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 15:33:03,536 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:33:03,536 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:33:03,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,552 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,607 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:33:03,613 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:33:03,615 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:03,616 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:03,617 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:03,617 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:03,617 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:03,618 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:03,620 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:03,620 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:03,624 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:33:03,625 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:03,626 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:03,626 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:03,626 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:03,626 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:03,626 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:03,627 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:03,627 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:03,635 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:33:03,639 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:33:03,639 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:33:03,642 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:33:03,642 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:33:03,642 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:33:03,642 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-18 15:33:03,644 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:33:03,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:03,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:03,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:33:03,753 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 15:33:03,754 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 4 states. [2018-11-18 15:33:03,842 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 4 states. Result 37 states and 45 transitions. Complement of second has 12 states. [2018-11-18 15:33:03,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 15:33:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 15:33:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2018-11-18 15:33:03,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2018-11-18 15:33:03,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:03,846 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2018-11-18 15:33:03,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:03,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2018-11-18 15:33:03,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:03,848 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 45 transitions. [2018-11-18 15:33:03,851 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 15:33:03,857 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 24 states and 31 transitions. [2018-11-18 15:33:03,858 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2018-11-18 15:33:03,858 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-18 15:33:03,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 31 transitions. [2018-11-18 15:33:03,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:33:03,860 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 31 transitions. [2018-11-18 15:33:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 31 transitions. [2018-11-18 15:33:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-11-18 15:33:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 15:33:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2018-11-18 15:33:03,882 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2018-11-18 15:33:03,882 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2018-11-18 15:33:03,882 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 15:33:03,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 25 transitions. [2018-11-18 15:33:03,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 15:33:03,883 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:33:03,883 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:33:03,884 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:33:03,884 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 15:33:03,884 INFO L794 eck$LassoCheckResult]: Stem: 131#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 129#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 113#L25 call main_#t~ret6 := rec2(main_~x~0);< 112#rec2ENTRY ~j := #in~j; 114#L18 assume !(~j <= 0); 116#L20 call #t~ret3 := rec2(~j - 1);< 115#rec2ENTRY ~j := #in~j; 117#L18 assume ~j <= 0;#res := 0; 126#rec2FINAL assume true; 127#rec2EXIT >#34#return; 119#L20-1 call #t~ret4 := rec1(#t~ret3);< 118#rec1ENTRY [2018-11-18 15:33:03,884 INFO L796 eck$LassoCheckResult]: Loop: 118#rec1ENTRY ~i := #in~i; 123#L12 assume !(~i <= 0); 120#L14 call #t~ret0 := rec1(~i - 2);< 118#rec1ENTRY [2018-11-18 15:33:03,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1193590059, now seen corresponding path program 1 times [2018-11-18 15:33:03,885 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:03,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:03,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:03,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,897 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2018-11-18 15:33:03,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:03,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:03,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:03,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:03,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:03,903 INFO L82 PathProgramCache]: Analyzing trace with hash -207203934, now seen corresponding path program 1 times [2018-11-18 15:33:03,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:03,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:03,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:03,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:33:03,947 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:33:03,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 15:33:03,972 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:33:03,972 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:33:03,972 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:33:03,972 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:33:03,973 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:33:03,973 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:03,973 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:33:03,973 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:33:03,973 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 15:33:03,973 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:33:03,973 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:33:03,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:03,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,016 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:33:04,016 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,022 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,022 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,055 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:33:04,055 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,081 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:33:04,082 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:33:04,083 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:33:04,083 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:33:04,083 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:33:04,083 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:33:04,083 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,083 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:33:04,083 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:33:04,083 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 15:33:04,083 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:33:04,084 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:33:04,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,127 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:33:04,127 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:33:04,128 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 [2018-11-18 15:33:04,128 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:04,128 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:04,129 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:04,129 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:04,129 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:04,129 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:04,129 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:04,133 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:33:04,136 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 15:33:04,136 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 15:33:04,136 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:33:04,137 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:33:04,137 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:33:04,137 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-18 15:33:04,137 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:33:04,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:33:04,261 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 15:33:04,261 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7 Second operand 5 states. [2018-11-18 15:33:04,321 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 44 states and 59 transitions. Complement of second has 14 states. [2018-11-18 15:33:04,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 15:33:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 15:33:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2018-11-18 15:33:04,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 11 letters. Loop has 3 letters. [2018-11-18 15:33:04,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:04,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 14 letters. Loop has 3 letters. [2018-11-18 15:33:04,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:04,325 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 11 letters. Loop has 6 letters. [2018-11-18 15:33:04,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:04,325 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 59 transitions. [2018-11-18 15:33:04,326 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 15:33:04,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 38 states and 51 transitions. [2018-11-18 15:33:04,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-11-18 15:33:04,328 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2018-11-18 15:33:04,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 51 transitions. [2018-11-18 15:33:04,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:33:04,328 INFO L705 BuchiCegarLoop]: Abstraction has 38 states and 51 transitions. [2018-11-18 15:33:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 51 transitions. [2018-11-18 15:33:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-11-18 15:33:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 15:33:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2018-11-18 15:33:04,332 INFO L728 BuchiCegarLoop]: Abstraction has 36 states and 47 transitions. [2018-11-18 15:33:04,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:33:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:33:04,335 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 6 states. [2018-11-18 15:33:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:33:04,370 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2018-11-18 15:33:04,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:33:04,371 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 44 transitions. [2018-11-18 15:33:04,372 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 15:33:04,373 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 32 states and 41 transitions. [2018-11-18 15:33:04,373 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 27 [2018-11-18 15:33:04,373 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-11-18 15:33:04,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 41 transitions. [2018-11-18 15:33:04,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:33:04,374 INFO L705 BuchiCegarLoop]: Abstraction has 32 states and 41 transitions. [2018-11-18 15:33:04,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states and 41 transitions. [2018-11-18 15:33:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-11-18 15:33:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 15:33:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-11-18 15:33:04,376 INFO L728 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-11-18 15:33:04,376 INFO L608 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-11-18 15:33:04,377 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 15:33:04,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 35 transitions. [2018-11-18 15:33:04,377 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 15:33:04,377 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:33:04,377 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:33:04,378 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:33:04,378 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 15:33:04,378 INFO L794 eck$LassoCheckResult]: Stem: 356#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 353#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 332#L25 call main_#t~ret6 := rec2(main_~x~0);< 331#rec2ENTRY ~j := #in~j; 333#L18 assume !(~j <= 0); 336#L20 call #t~ret3 := rec2(~j - 1);< 334#rec2ENTRY ~j := #in~j; 337#L18 assume !(~j <= 0); 335#L20 call #t~ret3 := rec2(~j - 1);< 334#rec2ENTRY ~j := #in~j; 338#L18 assume ~j <= 0;#res := 0; 347#rec2FINAL assume true; 348#rec2EXIT >#34#return; 351#L20-1 call #t~ret4 := rec1(#t~ret3);< 358#rec1ENTRY ~i := #in~i; 350#L12 assume ~i <= 0;#res := 0; 352#rec1FINAL assume true; 354#rec1EXIT >#36#return; 355#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 357#rec2FINAL assume true; 359#rec2EXIT >#34#return; 343#L20-1 call #t~ret4 := rec1(#t~ret3);< 339#rec1ENTRY [2018-11-18 15:33:04,378 INFO L796 eck$LassoCheckResult]: Loop: 339#rec1ENTRY ~i := #in~i; 344#L12 assume !(~i <= 0); 340#L14 call #t~ret0 := rec1(~i - 2);< 339#rec1ENTRY [2018-11-18 15:33:04,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1665524430, now seen corresponding path program 1 times [2018-11-18 15:33:04,379 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:04,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:04,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:04,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:04,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:04,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2018-11-18 15:33:04,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:04,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:04,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:04,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:33:04,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:33:04,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2118876407, now seen corresponding path program 1 times [2018-11-18 15:33:04,398 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:33:04,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:33:04,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:04,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:33:04,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:33:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:33:04,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:33:04,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 15:33:04,471 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:33:04,471 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:33:04,471 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:33:04,471 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:33:04,471 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:33:04,471 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,471 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:33:04,471 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:33:04,472 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 15:33:04,472 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:33:04,472 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:33:04,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,501 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:33:04,501 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,504 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,504 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,508 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:04,508 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,523 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,524 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,525 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:04,525 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,541 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,541 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,543 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:04,543 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,560 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,560 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,562 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:04,562 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,578 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,578 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,580 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:33:04,580 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,595 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:33:04,595 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ef2f9c2d-9438-42a6-bce7-9df3b4f6c2f6/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,616 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:33:04,616 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:33:04,632 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:33:04,633 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:33:04,633 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:33:04,633 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:33:04,634 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:33:04,634 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:33:04,634 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:33:04,634 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:33:04,634 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:33:04,634 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 15:33:04,634 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:33:04,634 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:33:04,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:33:04,657 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:33:04,657 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:33:04,657 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:04,658 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:04,658 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:04,658 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:04,658 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:04,658 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:04,658 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:04,658 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:04,659 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:33:04,660 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:04,660 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:04,660 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:04,660 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:04,660 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:04,661 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:04,661 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:04,661 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:04,662 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:33:04,662 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:04,662 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:04,663 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:04,663 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:04,663 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:04,663 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:04,663 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:04,663 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:04,664 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:33:04,664 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:04,665 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:04,665 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:04,665 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:04,665 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:04,665 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:04,666 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:04,666 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:04,666 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:33:04,667 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:33:04,667 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:33:04,667 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:33:04,667 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:33:04,668 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:33:04,668 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:33:04,668 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:33:04,668 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:33:04,671 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:33:04,672 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 15:33:04,672 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 15:33:04,672 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:33:04,672 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:33:04,672 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:33:04,672 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-18 15:33:04,673 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:33:04,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:33:04,744 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 15:33:04,744 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-18 15:33:04,792 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 32 states and 38 transitions. Complement of second has 7 states. [2018-11-18 15:33:04,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-18 15:33:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 15:33:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-11-18 15:33:04,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2018-11-18 15:33:04,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:04,794 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 15:33:04,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:33:04,860 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 15:33:04,861 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-18 15:33:04,891 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 32 states and 38 transitions. Complement of second has 7 states. [2018-11-18 15:33:04,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-18 15:33:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 15:33:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-11-18 15:33:04,892 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2018-11-18 15:33:04,892 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:04,892 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 15:33:04,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:33:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:33:04,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:33:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:33:04,951 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 15:33:04,951 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-18 15:33:05,019 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 54 states and 66 transitions. Complement of second has 13 states. [2018-11-18 15:33:05,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 15:33:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 15:33:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2018-11-18 15:33:05,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 22 letters. Loop has 3 letters. [2018-11-18 15:33:05,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:05,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 25 letters. Loop has 3 letters. [2018-11-18 15:33:05,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:05,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 22 letters. Loop has 6 letters. [2018-11-18 15:33:05,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:33:05,021 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 66 transitions. [2018-11-18 15:33:05,023 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 15:33:05,024 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 42 states and 53 transitions. [2018-11-18 15:33:05,024 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2018-11-18 15:33:05,024 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2018-11-18 15:33:05,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 53 transitions. [2018-11-18 15:33:05,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:33:05,024 INFO L705 BuchiCegarLoop]: Abstraction has 42 states and 53 transitions. [2018-11-18 15:33:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 53 transitions. [2018-11-18 15:33:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2018-11-18 15:33:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 15:33:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2018-11-18 15:33:05,027 INFO L728 BuchiCegarLoop]: Abstraction has 40 states and 49 transitions. [2018-11-18 15:33:05,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 15:33:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:33:05,028 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2018-11-18 15:33:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:33:05,054 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-11-18 15:33:05,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:33:05,055 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 30 transitions. [2018-11-18 15:33:05,055 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 15:33:05,055 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 0 states and 0 transitions. [2018-11-18 15:33:05,055 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 15:33:05,056 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 15:33:05,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 15:33:05,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 15:33:05,056 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:33:05,056 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:33:05,056 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:33:05,056 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 15:33:05,056 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:33:05,056 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 15:33:05,056 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 15:33:05,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 03:33:05 BoogieIcfgContainer [2018-11-18 15:33:05,060 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 15:33:05,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:33:05,060 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:33:05,061 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:33:05,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:33:03" (3/4) ... [2018-11-18 15:33:05,063 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 15:33:05,063 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:33:05,064 INFO L168 Benchmark]: Toolchain (without parser) took 2509.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 214.4 MB). Free memory was 959.1 MB in the beginning and 1.2 GB in the end (delta: -223.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:33:05,065 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-11-18 15:33:05,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.49 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:33:05,065 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.17 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:33:05,066 INFO L168 Benchmark]: Boogie Preprocessor took 16.82 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:33:05,066 INFO L168 Benchmark]: RCFGBuilder took 264.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -172.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:33:05,067 INFO L168 Benchmark]: BuchiAutomizer took 2033.74 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -68.9 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:33:05,067 INFO L168 Benchmark]: Witness Printer took 2.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2018-11-18 15:33:05,069 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 162.49 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.17 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.82 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 264.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -172.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2033.74 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -68.9 MB). Peak memory consumption was 2.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.9s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 1.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 29 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 95 SDtfs, 100 SDslu, 188 SDs, 0 SdLazy, 123 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...