./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c -s /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 0.1.24-cad4683 [2019-10-22 08:56:51,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:51,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:51,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:51,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:52,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:52,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:52,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:52,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:52,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:52,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:52,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:52,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:52,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:52,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:52,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:52,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:52,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:52,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:52,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:52,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:52,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:52,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:52,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:52,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:52,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:52,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:52,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:52,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:52,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:52,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:52,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:52,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:52,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:52,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:52,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:52,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:52,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:52,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:52,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:52,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:52,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 08:56:52,039 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:52,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:52,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:52,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:52,040 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:52,040 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 08:56:52,041 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 08:56:52,041 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 08:56:52,041 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 08:56:52,041 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 08:56:52,041 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 08:56:52,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 08:56:52,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:56:52,043 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 08:56:52,043 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:52,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 08:56:52,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:52,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:52,044 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 08:56:52,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:52,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:52,044 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 08:56:52,045 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 08:56:52,045 INFO L138 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 [2019-10-22 08:56:52,068 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:52,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:52,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:52,081 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:52,081 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:52,082 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2019-10-22 08:56:52,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/data/b3fd9a93a/e434b0aac50340e4abb1d6c4195fdbcb/FLAG5f7d53d41 [2019-10-22 08:56:52,525 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:52,525 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2019-10-22 08:56:52,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/data/b3fd9a93a/e434b0aac50340e4abb1d6c4195fdbcb/FLAG5f7d53d41 [2019-10-22 08:56:52,546 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/data/b3fd9a93a/e434b0aac50340e4abb1d6c4195fdbcb [2019-10-22 08:56:52,549 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:52,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:56:52,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:52,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:52,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:52,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d86caae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52, skipping insertion in model container [2019-10-22 08:56:52,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:52,590 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:52,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:52,784 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:52,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:52,905 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:52,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52 WrapperNode [2019-10-22 08:56:52,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:52,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:52,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:56:52,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:56:52,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:52,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:52,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:52,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:52,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... [2019-10-22 08:56:52,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:52,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:52,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:52,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:52,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 [2019-10-22 08:56:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-10-22 08:56:53,010 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-10-22 08:56:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-10-22 08:56:53,011 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-10-22 08:56:53,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:53,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:53,247 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:53,247 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:56:53,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:53 BoogieIcfgContainer [2019-10-22 08:56:53,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:53,249 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 08:56:53,250 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 08:56:53,253 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 08:56:53,254 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:56:53,254 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 08:56:52" (1/3) ... [2019-10-22 08:56:53,263 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7544a34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:56:53, skipping insertion in model container [2019-10-22 08:56:53,263 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:56:53,264 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:52" (2/3) ... [2019-10-22 08:56:53,264 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7544a34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:56:53, skipping insertion in model container [2019-10-22 08:56:53,264 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:56:53,264 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:53" (3/3) ... [2019-10-22 08:56:53,266 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2019-10-22 08:56:53,333 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 08:56:53,333 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 08:56:53,334 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 08:56:53,334 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:53,334 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:53,334 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 08:56:53,334 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:53,334 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 08:56:53,352 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-10-22 08:56:53,387 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-10-22 08:56:53,387 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:53,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:53,394 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-10-22 08:56:53,394 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:56:53,394 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 08:56:53,395 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-10-22 08:56:53,396 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-10-22 08:56:53,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:53,397 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:53,397 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-10-22 08:56:53,397 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:56:53,403 INFO L791 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-10-22 08:56:53,403 INFO L793 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2019-10-22 08:56:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:53,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-10-22 08:56:53,414 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:53,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31765050] [2019-10-22 08:56:53,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:53,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:53,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:53,495 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2019-10-22 08:56:53,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:53,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739304675] [2019-10-22 08:56:53,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:53,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:53,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:53,516 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2019-10-22 08:56:53,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:53,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923677275] [2019-10-22 08:56:53,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:53,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:53,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:53,534 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:53,607 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:53,607 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:53,608 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:53,608 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:53,608 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:53,608 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:53,608 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:53,608 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:53,608 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2019-10-22 08:56:53,609 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:53,609 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:53,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,630 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,685 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:53,686 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 [2019-10-22 08:56:53,701 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:53,701 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:53,709 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:53,710 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 [2019-10-22 08:56:53,721 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:53,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:53,727 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:53,728 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:53,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:53,736 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:53,745 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:53,745 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 [2019-10-22 08:56:53,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:53,751 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/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 [2019-10-22 08:56:53,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:53,758 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:56:53,764 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:53,766 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:53,766 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:53,766 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:53,766 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:53,766 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:53,767 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:53,767 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:53,767 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:53,767 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2019-10-22 08:56:53,767 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:53,767 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:53,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:53,816 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:53,821 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:53,823 INFO L120 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 [2019-10-22 08:56:53,824 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:53,825 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:53,825 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:53,825 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:53,826 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:53,828 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:53,828 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:53,832 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:53,833 INFO L120 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 [2019-10-22 08:56:53,833 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:53,833 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:53,834 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:53,834 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:53,834 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:53,835 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:53,835 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:53,844 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:53,849 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:56:53,849 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:56:53,851 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:53,851 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:53,851 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:53,852 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-10-22 08:56:53,855 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:53,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:56:53,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:54,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:54,052 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 [2019-10-22 08:56:54,053 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2019-10-22 08:56:54,146 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2019-10-22 08:56:54,147 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 [2019-10-22 08:56:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 08:56:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-10-22 08:56:54,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2019-10-22 08:56:54,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2019-10-22 08:56:54,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2019-10-22 08:56:54,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2019-10-22 08:56:54,156 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:54,162 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2019-10-22 08:56:54,163 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-10-22 08:56:54,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2019-10-22 08:56:54,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2019-10-22 08:56:54,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:54,166 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-10-22 08:56:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2019-10-22 08:56:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-10-22 08:56:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:56:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-10-22 08:56:54,192 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-22 08:56:54,192 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-22 08:56:54,192 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 08:56:54,192 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2019-10-22 08:56:54,193 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:54,193 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:54,193 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:54,194 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:54,194 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:56:54,194 INFO L791 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2019-10-22 08:56:54,194 INFO L793 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2019-10-22 08:56:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2019-10-22 08:56:54,195 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743074340] [2019-10-22 08:56:54,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,209 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-10-22 08:56:54,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181932090] [2019-10-22 08:56:54,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,217 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2019-10-22 08:56:54,217 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743603754] [2019-10-22 08:56:54,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:56:54,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743603754] [2019-10-22 08:56:54,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:54,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:56:54,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534656269] [2019-10-22 08:56:54,308 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:54,309 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:54,309 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:54,309 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:54,309 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:54,309 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,309 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:54,309 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:54,309 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2019-10-22 08:56:54,309 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:54,310 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:54,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,366 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:54,366 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:54,373 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:54,373 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:54,383 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:54,383 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,429 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:54,430 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:54,431 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:54,431 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:54,431 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:54,431 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:54,431 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,431 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:54,431 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:54,431 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2019-10-22 08:56:54,431 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:54,431 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:54,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,489 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:54,489 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:54,490 INFO L120 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 [2019-10-22 08:56:54,490 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:54,491 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:54,491 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:54,491 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:54,491 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:54,491 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:54,491 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:54,496 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:54,501 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-10-22 08:56:54,502 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2019-10-22 08:56:54,503 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:54,503 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:54,503 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:54,503 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-10-22 08:56:54,504 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:54,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:54,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:54,599 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 [2019-10-22 08:56:54,599 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2019-10-22 08:56:54,686 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2019-10-22 08:56:54,687 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 [2019-10-22 08:56:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 08:56:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2019-10-22 08:56:54,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2019-10-22 08:56:54,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2019-10-22 08:56:54,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,691 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2019-10-22 08:56:54,692 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:54,692 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2019-10-22 08:56:54,695 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:54,697 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2019-10-22 08:56:54,697 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-10-22 08:56:54,697 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2019-10-22 08:56:54,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2019-10-22 08:56:54,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:54,698 INFO L688 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2019-10-22 08:56:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2019-10-22 08:56:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-22 08:56:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:56:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-10-22 08:56:54,704 INFO L711 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-10-22 08:56:54,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:54,708 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2019-10-22 08:56:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:54,748 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-22 08:56:54,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:56:54,749 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2019-10-22 08:56:54,751 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:54,752 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2019-10-22 08:56:54,752 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2019-10-22 08:56:54,753 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-10-22 08:56:54,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2019-10-22 08:56:54,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:54,753 INFO L688 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2019-10-22 08:56:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2019-10-22 08:56:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-10-22 08:56:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 08:56:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-22 08:56:54,758 INFO L711 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-22 08:56:54,758 INFO L591 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-22 08:56:54,758 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 08:56:54,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2019-10-22 08:56:54,760 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:54,760 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:56:54,760 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:56:54,761 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:54,761 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:56:54,761 INFO L791 eck$LassoCheckResult]: Stem: 347#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 324#L25 call main_#t~ret6 := rec2(main_~x~0);< 323#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 327#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 330#L18 assume !(~j <= 0); 328#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 329#L18 assume ~j <= 0;#res := 0; 340#rec2FINAL assume true; 341#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 331#rec1ENTRY ~i := #in~i; 333#L12 assume ~i <= 0;#res := 0; 344#rec1FINAL assume true; 345#rec1EXIT >#35#return; 346#L20-2 #res := #t~ret4 - 1;havoc #t~ret4;havoc #t~ret3; 348#rec2FINAL assume true; 350#rec2EXIT >#33#return; 337#L20-1 call #t~ret4 := rec1(#t~ret3);< 342#rec1ENTRY [2019-10-22 08:56:54,761 INFO L793 eck$LassoCheckResult]: Loop: 342#rec1ENTRY ~i := #in~i; 349#L12 assume !(~i <= 0); 335#L14 call #t~ret0 := rec1(~i - 2);< 342#rec1ENTRY [2019-10-22 08:56:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,762 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2019-10-22 08:56:54,762 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904707304] [2019-10-22 08:56:54,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,789 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-10-22 08:56:54,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690417762] [2019-10-22 08:56:54,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:54,807 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2019-10-22 08:56:54,808 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:54,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773938597] [2019-10-22 08:56:54,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:54,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:56:54,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773938597] [2019-10-22 08:56:54,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:54,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-22 08:56:54,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854456737] [2019-10-22 08:56:54,943 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:54,943 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:54,943 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:54,943 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:54,943 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:56:54,943 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:54,944 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:54,944 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:54,944 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2019-10-22 08:56:54,945 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:54,945 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:54,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:54,990 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:54,990 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:54,996 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:54,996 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,000 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:55,001 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:55,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:55,010 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,014 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:55,014 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:55,021 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:55,021 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,025 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:55,025 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:55,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:55,033 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,037 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:55,037 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:55,046 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:55,047 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,050 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:56:55,051 INFO L440 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_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:55,059 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:56:55,060 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_acbadfd8-200a-43bd-ba58-93a4d1187bd8/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:56:55,073 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:56:55,073 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,130 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:56:55,131 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:56:55,132 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:56:55,132 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:56:55,132 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:56:55,132 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:56:55,132 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:56:55,132 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:56:55,132 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:56:55,132 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2019-10-22 08:56:55,132 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:56:55,132 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:56:55,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:55,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:55,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:55,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:55,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:55,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:56:55,178 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:56:55,178 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:56:55,178 INFO L120 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 [2019-10-22 08:56:55,179 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:55,179 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:55,180 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:55,180 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:55,180 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:55,180 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:55,180 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:55,182 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:55,182 INFO L120 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 [2019-10-22 08:56:55,183 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:55,183 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:55,184 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:55,184 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:55,184 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:55,184 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:55,184 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:55,185 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:55,186 INFO L120 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 [2019-10-22 08:56:55,186 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:55,186 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:55,187 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:55,187 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:55,187 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:55,188 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:55,188 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:55,189 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:55,189 INFO L120 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 [2019-10-22 08:56:55,190 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:55,190 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:55,190 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:55,190 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:55,190 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:55,191 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:55,191 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:55,192 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:56:55,193 INFO L120 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 [2019-10-22 08:56:55,193 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:56:55,193 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:56:55,193 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:56:55,194 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:56:55,194 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:56:55,194 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:56:55,194 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:56:55,198 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:56:55,200 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-10-22 08:56:55,200 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2019-10-22 08:56:55,201 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:56:55,201 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:56:55,201 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:56:55,201 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-10-22 08:56:55,202 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:56:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:55,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:55,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:55,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:55,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:55,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:55,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:55,344 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 [2019-10-22 08:56:55,344 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-10-22 08:56:55,414 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2019-10-22 08:56:55,415 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 [2019-10-22 08:56:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 08:56:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-10-22 08:56:55,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2019-10-22 08:56:55,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:55,416 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:56:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:55,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:55,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:55,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:55,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:55,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:55,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:55,532 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 [2019-10-22 08:56:55,533 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-10-22 08:56:55,587 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2019-10-22 08:56:55,591 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 [2019-10-22 08:56:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 08:56:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-10-22 08:56:55,592 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2019-10-22 08:56:55,592 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:55,592 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:56:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:55,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:55,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:55,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:55,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:55,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:55,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:55,682 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 [2019-10-22 08:56:55,683 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-10-22 08:56:55,791 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2019-10-22 08:56:55,791 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 [2019-10-22 08:56:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 08:56:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2019-10-22 08:56:55,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2019-10-22 08:56:55,792 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:55,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2019-10-22 08:56:55,793 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:55,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2019-10-22 08:56:55,793 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:56:55,793 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2019-10-22 08:56:55,795 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 08:56:55,796 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2019-10-22 08:56:55,797 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2019-10-22 08:56:55,797 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2019-10-22 08:56:55,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2019-10-22 08:56:55,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:56:55,797 INFO L688 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-10-22 08:56:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2019-10-22 08:56:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-22 08:56:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 08:56:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-10-22 08:56:55,801 INFO L711 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-10-22 08:56:55,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:55,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:56:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:55,802 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2019-10-22 08:56:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:55,850 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-22 08:56:55,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:56:55,851 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2019-10-22 08:56:55,851 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:56:55,852 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2019-10-22 08:56:55,852 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 08:56:55,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 08:56:55,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 08:56:55,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:56:55,852 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:55,852 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:55,852 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:55,852 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 08:56:55,852 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:56:55,852 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:56:55,853 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 08:56:55,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 08:56:55 BoogieIcfgContainer [2019-10-22 08:56:55,858 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 08:56:55,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:55,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:55,859 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:55,860 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:53" (3/4) ... [2019-10-22 08:56:55,863 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:56:55,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:55,865 INFO L168 Benchmark]: Toolchain (without parser) took 3313.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 943.2 MB in the beginning and 1.0 GB in the end (delta: -81.7 MB). Peak memory consumption was 46.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,865 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:55,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,866 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,867 INFO L168 Benchmark]: Boogie Preprocessor took 17.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:55,867 INFO L168 Benchmark]: RCFGBuilder took 292.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,868 INFO L168 Benchmark]: BuchiAutomizer took 2608.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:55,868 INFO L168 Benchmark]: Witness Printer took 4.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:55,871 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 351.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -182.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 292.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2608.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 11.5 GB. * Witness Printer took 4.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 2.5s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 1.2s. Construction of modules took 0.1s. Büchi inclusion checks took 1.0s. 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 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 126 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq153 hnf94 smp100 dnf100 smp100 tf112 neg100 sie110 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: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...