./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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 0837a1e1d82be1b28ccf3514392f1b01c88a9160 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 02:42:01,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:42:01,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:42:01,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:42:01,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:42:01,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:42:01,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:42:01,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:42:01,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:42:01,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:42:01,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:42:01,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:42:01,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:42:01,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:42:01,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:42:01,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:42:01,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:42:01,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:42:01,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:42:01,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:42:01,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:42:01,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:42:01,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:42:01,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:42:01,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:42:01,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:42:01,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:42:01,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:42:01,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:42:01,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:42:01,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:42:01,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:42:01,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:42:01,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:42:01,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:42:01,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:42:01,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:42:01,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:42:01,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:42:01,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:42:01,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:42:01,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 02:42:01,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:42:01,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:42:01,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:42:01,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:42:01,945 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:42:01,945 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 02:42:01,946 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 02:42:01,946 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 02:42:01,946 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 02:42:01,946 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 02:42:01,947 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 02:42:01,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:42:01,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 02:42:01,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:42:01,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:42:01,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 02:42:01,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 02:42:01,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 02:42:01,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:42:01,949 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 02:42:01,949 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:42:01,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 02:42:01,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:42:01,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:42:01,950 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 02:42:01,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:42:01,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:42:01,951 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 02:42:01,952 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 02:42:01,952 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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 -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2019-11-20 02:42:02,108 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:42:02,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:42:02,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:42:02,122 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:42:02,123 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:42:02,123 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2019-11-20 02:42:02,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/data/f90c4bf76/a94e236a146d4b9f819435c728eab93a/FLAGc15cafffc [2019-11-20 02:42:02,551 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:42:02,551 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2019-11-20 02:42:02,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/data/f90c4bf76/a94e236a146d4b9f819435c728eab93a/FLAGc15cafffc [2019-11-20 02:42:02,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/data/f90c4bf76/a94e236a146d4b9f819435c728eab93a [2019-11-20 02:42:02,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:42:02,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:42:02,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:42:02,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:42:02,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:42:02,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf8b05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02, skipping insertion in model container [2019-11-20 02:42:02,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,591 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:42:02,608 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:42:02,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:42:02,800 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:42:02,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:42:02,889 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:42:02,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02 WrapperNode [2019-11-20 02:42:02,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:42:02,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:42:02,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:42:02,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:42:02,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:42:02,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:42:02,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:42:02,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:42:02,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... [2019-11-20 02:42:02,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:42:02,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:42:02,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:42:02,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:42:02,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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 [2019-11-20 02:42:02,981 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-20 02:42:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-20 02:42:02,981 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-20 02:42:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-20 02:42:02,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:42:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:42:03,146 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:42:03,146 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 02:42:03,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:42:03 BoogieIcfgContainer [2019-11-20 02:42:03,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:42:03,148 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 02:42:03,148 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 02:42:03,151 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 02:42:03,152 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:42:03,152 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 02:42:02" (1/3) ... [2019-11-20 02:42:03,153 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@61844f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 02:42:03, skipping insertion in model container [2019-11-20 02:42:03,153 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:42:03,153 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:42:02" (2/3) ... [2019-11-20 02:42:03,154 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@61844f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 02:42:03, skipping insertion in model container [2019-11-20 02:42:03,154 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:42:03,154 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:42:03" (3/3) ... [2019-11-20 02:42:03,156 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2019-11-20 02:42:03,198 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 02:42:03,198 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 02:42:03,198 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 02:42:03,198 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:42:03,199 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:42:03,199 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 02:42:03,199 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:42:03,199 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 02:42:03,212 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-20 02:42:03,236 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:03,236 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:03,236 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:03,244 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 02:42:03,244 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:03,244 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 02:42:03,245 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-20 02:42:03,247 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:03,247 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:03,248 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:03,248 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 02:42:03,248 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:03,271 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-20 02:42:03,272 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 3#rec2ENTRYtrue [2019-11-20 02:42:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-20 02:42:03,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:03,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970377452] [2019-11-20 02:42:03,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,374 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2019-11-20 02:42:03,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:03,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182591781] [2019-11-20 02:42:03,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:03,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182591781] [2019-11-20 02:42:03,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:42:03,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 02:42:03,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129112481] [2019-11-20 02:42:03,471 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:42:03,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:42:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:42:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:42:03,486 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-11-20 02:42:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:42:03,597 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2019-11-20 02:42:03,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:42:03,600 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2019-11-20 02:42:03,604 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:03,610 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2019-11-20 02:42:03,611 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-20 02:42:03,612 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2019-11-20 02:42:03,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2019-11-20 02:42:03,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:42:03,614 INFO L688 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-20 02:42:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2019-11-20 02:42:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-20 02:42:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 02:42:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2019-11-20 02:42:03,640 INFO L711 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-20 02:42:03,640 INFO L591 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2019-11-20 02:42:03,640 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 02:42:03,640 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2019-11-20 02:42:03,641 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:03,641 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:03,641 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:03,641 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 02:42:03,642 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:03,642 INFO L794 eck$LassoCheckResult]: Stem: 77#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; 64#L25 call main_#t~ret6 := rec2(main_~x~0);< 63#rec2ENTRY [2019-11-20 02:42:03,642 INFO L796 eck$LassoCheckResult]: Loop: 63#rec2ENTRY ~j := #in~j; 66#L18 assume !(~j <= 0); 71#L20 call #t~ret3 := rec1(~j);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume !(~i <= 0); 68#L14 call #t~ret0 := rec1(~i - 2);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume ~i <= 0;#res := 0; 73#rec1FINAL assume true; 74#rec1EXIT >#27#return; 69#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume ~i <= 0;#res := 0; 73#rec1FINAL assume true; 74#rec1EXIT >#29#return; 70#L14-2 call #t~ret2 := rec1(#t~ret1);< 67#rec1ENTRY ~i := #in~i; 72#L12 assume ~i <= 0;#res := 0; 73#rec1FINAL assume true; 74#rec1EXIT >#31#return; 75#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 76#rec1FINAL assume true; 78#rec1EXIT >#33#return; 65#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 63#rec2ENTRY [2019-11-20 02:42:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2019-11-20 02:42:03,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:03,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744970755] [2019-11-20 02:42:03,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,648 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2019-11-20 02:42:03,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:03,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642864353] [2019-11-20 02:42:03,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,683 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:03,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2019-11-20 02:42:03,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:03,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841486132] [2019-11-20 02:42:03,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:03,715 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:03,985 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-11-20 02:42:04,152 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:04,153 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:04,153 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:04,154 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:04,157 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:42:04,157 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,157 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:04,158 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:04,158 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2019-11-20 02:42:04,158 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:04,158 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:04,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,189 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,247 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:04,248 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:04,255 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:04,255 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,262 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:04,262 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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 [2019-11-20 02:42:04,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:04,274 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:04,277 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:04,277 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,283 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:04,283 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:04,287 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:04,287 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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 [2019-11-20 02:42:04,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:04,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:04,297 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:04,297 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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 [2019-11-20 02:42:04,302 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:04,303 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,323 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:42:04,323 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:04,338 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:42:04,347 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:04,347 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:04,347 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:04,347 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:04,347 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:42:04,347 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,348 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:04,348 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:04,348 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2019-11-20 02:42:04,348 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:04,348 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:04,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,372 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:04,404 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:04,409 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:04,423 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 [2019-11-20 02:42:04,425 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:04,425 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:04,426 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:04,426 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:04,426 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:04,428 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:04,429 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,431 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:04,448 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 [2019-11-20 02:42:04,450 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:04,450 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:04,450 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:04,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:04,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:04,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:04,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,458 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:04,467 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 [2019-11-20 02:42:04,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:04,469 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:04,469 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:04,469 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:04,469 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:04,472 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:04,472 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,478 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,487 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 [2019-11-20 02:42:04,488 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:04,488 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:04,489 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:04,489 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:04,489 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:04,491 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:04,491 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:04,493 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:42:04,499 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:42:04,499 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:04,517 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:42:04,518 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:42:04,518 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:42:04,519 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:04,523 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:42:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:04,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 02:42:04,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:04,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:42:04,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 02:42:04,753 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2019-11-20 02:42:04,754 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand 9 states. [2019-11-20 02:42:05,279 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 101 states and 147 transitions. Complement of second has 42 states. [2019-11-20 02:42:05,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-20 02:42:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 02:42:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-11-20 02:42:05,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2019-11-20 02:42:05,293 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:05,295 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2019-11-20 02:42:05,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:05,297 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2019-11-20 02:42:05,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:05,299 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2019-11-20 02:42:05,308 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:05,326 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2019-11-20 02:42:05,326 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2019-11-20 02:42:05,327 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2019-11-20 02:42:05,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2019-11-20 02:42:05,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:05,330 INFO L688 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2019-11-20 02:42:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2019-11-20 02:42:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2019-11-20 02:42:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 02:42:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2019-11-20 02:42:05,345 INFO L711 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2019-11-20 02:42:05,345 INFO L591 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2019-11-20 02:42:05,345 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 02:42:05,345 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2019-11-20 02:42:05,348 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:05,348 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:05,348 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:05,349 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:05,349 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:42:05,349 INFO L794 eck$LassoCheckResult]: Stem: 375#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; 338#L25 call main_#t~ret6 := rec2(main_~x~0);< 337#rec2ENTRY ~j := #in~j; 340#L18 assume !(~j <= 0); 369#L20 call #t~ret3 := rec1(~j);< 382#rec1ENTRY ~i := #in~i; 368#L12 assume !(~i <= 0); 346#L14 call #t~ret0 := rec1(~i - 2);< 343#rec1ENTRY [2019-11-20 02:42:05,350 INFO L796 eck$LassoCheckResult]: Loop: 343#rec1ENTRY ~i := #in~i; 351#L12 assume !(~i <= 0); 344#L14 call #t~ret0 := rec1(~i - 2);< 343#rec1ENTRY [2019-11-20 02:42:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2019-11-20 02:42:05,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:05,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003186126] [2019-11-20 02:42:05,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:05,361 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:05,362 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-20 02:42:05,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:05,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62508209] [2019-11-20 02:42:05,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:05,368 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2019-11-20 02:42:05,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:05,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155104204] [2019-11-20 02:42:05,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:05,399 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 02:42:05,461 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:05,461 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:05,462 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:05,462 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:05,462 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:42:05,462 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,462 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:05,462 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:05,462 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2019-11-20 02:42:05,462 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:05,462 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:05,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,535 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:05,536 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:05,555 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:05,555 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 [2019-11-20 02:42:05,564 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:05,564 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,575 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:05,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:05,583 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:05,583 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/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) [2019-11-20 02:42:05,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:05,602 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 [2019-11-20 02:42:05,607 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:05,607 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:05,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:05,625 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,629 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:05,629 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:05,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:05,643 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,659 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:42:05,660 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:05,714 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:42:05,716 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:05,716 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:05,716 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:05,716 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:05,716 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:42:05,716 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,716 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:05,716 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:05,716 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2019-11-20 02:42:05,717 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:05,717 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:05,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:05,769 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:05,769 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:05,774 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 [2019-11-20 02:42:05,775 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:05,776 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:05,776 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:05,776 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:05,776 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:05,777 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:05,777 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,779 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:05,787 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 [2019-11-20 02:42:05,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:05,789 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:05,789 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:05,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:05,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:05,790 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:05,791 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,794 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:05,804 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 [2019-11-20 02:42:05,805 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:05,805 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:05,806 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:05,806 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:05,806 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:05,807 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:05,807 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,810 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 22 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,816 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 [2019-11-20 02:42:05,817 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:05,817 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:05,817 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:05,817 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:05,817 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:05,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:05,818 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:05,820 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:42:05,822 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:42:05,822 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:05,826 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:42:05,826 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:42:05,826 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:42:05,826 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 02:42:05,828 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:42:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:05,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:42:05,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:05,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:05,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:05,924 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 [2019-11-20 02:42:05,924 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand 4 states. [2019-11-20 02:42:06,007 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40. Second operand 4 states. Result 108 states and 165 transitions. Complement of second has 13 states. [2019-11-20 02:42:06,011 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 [2019-11-20 02:42:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 02:42:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-11-20 02:42:06,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-20 02:42:06,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:06,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2019-11-20 02:42:06,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:06,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-20 02:42:06,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:06,012 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2019-11-20 02:42:06,016 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:06,021 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2019-11-20 02:42:06,021 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2019-11-20 02:42:06,021 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2019-11-20 02:42:06,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2019-11-20 02:42:06,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:06,022 INFO L688 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2019-11-20 02:42:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2019-11-20 02:42:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2019-11-20 02:42:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-20 02:42:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2019-11-20 02:42:06,035 INFO L711 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2019-11-20 02:42:06,036 INFO L591 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2019-11-20 02:42:06,036 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 02:42:06,036 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2019-11-20 02:42:06,038 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:06,039 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:06,039 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:06,039 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:06,040 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:42:06,040 INFO L794 eck$LassoCheckResult]: Stem: 617#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; 618#L25 call main_#t~ret6 := rec2(main_~x~0);< 621#rec2ENTRY ~j := #in~j; 638#L18 assume !(~j <= 0); 592#L20 call #t~ret3 := rec1(~j);< 630#rec1ENTRY ~i := #in~i; 639#L12 assume !(~i <= 0); 580#L14 call #t~ret0 := rec1(~i - 2);< 579#rec1ENTRY ~i := #in~i; 582#L12 assume ~i <= 0;#res := 0; 641#rec1FINAL assume true; 626#rec1EXIT >#27#return; 591#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 594#rec1ENTRY [2019-11-20 02:42:06,040 INFO L796 eck$LassoCheckResult]: Loop: 594#rec1ENTRY ~i := #in~i; 634#L12 assume !(~i <= 0); 610#L14 call #t~ret0 := rec1(~i - 2);< 594#rec1ENTRY [2019-11-20 02:42:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2019-11-20 02:42:06,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386894350] [2019-11-20 02:42:06,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,052 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-20 02:42:06,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155937434] [2019-11-20 02:42:06,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,058 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2019-11-20 02:42:06,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685828756] [2019-11-20 02:42:06,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:42:06,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685828756] [2019-11-20 02:42:06,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:42:06,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 02:42:06,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015925244] [2019-11-20 02:42:06,152 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:06,152 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:06,153 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:06,153 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:06,153 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:42:06,153 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,153 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:06,153 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:06,153 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2019-11-20 02:42:06,153 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:06,153 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:06,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,203 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:06,204 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,214 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:06,214 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:06,217 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:06,217 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,222 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:06,222 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:06,224 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:06,225 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,229 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:06,229 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:06,232 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:06,232 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:06,237 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:42:06,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:06,287 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:42:06,289 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:06,289 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:06,289 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:06,289 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:06,289 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:42:06,289 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,289 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:06,289 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:06,289 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2019-11-20 02:42:06,289 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:06,290 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:06,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:06,359 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:06,359 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,362 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 [2019-11-20 02:42:06,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:06,364 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:06,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:06,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:06,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:06,365 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:06,365 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:06,367 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,371 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 [2019-11-20 02:42:06,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:06,372 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:06,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:06,372 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:06,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:06,373 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:06,373 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:06,374 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,378 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 [2019-11-20 02:42:06,379 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:06,380 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:06,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:06,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:06,380 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:06,381 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:06,381 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:06,383 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:42:06,390 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:42:06,391 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:06,395 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:42:06,395 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:42:06,395 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:42:06,395 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 02:42:06,397 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:42:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:42:06,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:06,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:06,480 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 [2019-11-20 02:42:06,480 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand 5 states. [2019-11-20 02:42:06,565 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57. Second operand 5 states. Result 132 states and 207 transitions. Complement of second has 14 states. [2019-11-20 02:42:06,567 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 [2019-11-20 02:42:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-20 02:42:06,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-20 02:42:06,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:06,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2019-11-20 02:42:06,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:06,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2019-11-20 02:42:06,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:06,568 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2019-11-20 02:42:06,573 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:06,578 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2019-11-20 02:42:06,578 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2019-11-20 02:42:06,578 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2019-11-20 02:42:06,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2019-11-20 02:42:06,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:06,579 INFO L688 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2019-11-20 02:42:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2019-11-20 02:42:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2019-11-20 02:42:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-20 02:42:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2019-11-20 02:42:06,592 INFO L711 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2019-11-20 02:42:06,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:42:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:42:06,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:42:06,593 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand 6 states. [2019-11-20 02:42:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:42:06,630 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2019-11-20 02:42:06,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 02:42:06,631 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2019-11-20 02:42:06,635 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-20 02:42:06,639 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2019-11-20 02:42:06,639 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2019-11-20 02:42:06,640 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2019-11-20 02:42:06,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2019-11-20 02:42:06,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:06,640 INFO L688 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2019-11-20 02:42:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2019-11-20 02:42:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2019-11-20 02:42:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-20 02:42:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2019-11-20 02:42:06,654 INFO L711 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2019-11-20 02:42:06,654 INFO L591 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2019-11-20 02:42:06,654 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 02:42:06,654 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2019-11-20 02:42:06,656 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 02:42:06,657 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:06,657 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:06,658 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:06,658 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:06,658 INFO L794 eck$LassoCheckResult]: Stem: 1186#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; 1187#L25 call main_#t~ret6 := rec2(main_~x~0);< 1194#rec2ENTRY ~j := #in~j; 1208#L18 assume !(~j <= 0); 1200#L20 call #t~ret3 := rec1(~j);< 1207#rec1ENTRY ~i := #in~i; 1206#L12 assume !(~i <= 0); 1154#L14 call #t~ret0 := rec1(~i - 2);< 1205#rec1ENTRY ~i := #in~i; 1203#L12 assume !(~i <= 0); 1165#L14 call #t~ret0 := rec1(~i - 2);< 1202#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1229#rec1FINAL assume true; 1184#rec1EXIT >#27#return; 1147#L14-1 [2019-11-20 02:42:06,658 INFO L796 eck$LassoCheckResult]: Loop: 1147#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1145#rec1ENTRY ~i := #in~i; 1148#L12 assume ~i <= 0;#res := 0; 1221#rec1FINAL assume true; 1215#rec1EXIT >#29#return; 1160#L14-2 call #t~ret2 := rec1(#t~ret1);< 1182#rec1ENTRY ~i := #in~i; 1218#L12 assume !(~i <= 0); 1162#L14 call #t~ret0 := rec1(~i - 2);< 1182#rec1ENTRY ~i := #in~i; 1218#L12 assume ~i <= 0;#res := 0; 1217#rec1FINAL assume true; 1216#rec1EXIT >#27#return; 1147#L14-1 [2019-11-20 02:42:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2019-11-20 02:42:06,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350238173] [2019-11-20 02:42:06,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,671 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2019-11-20 02:42:06,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471287351] [2019-11-20 02:42:06,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:42:06,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471287351] [2019-11-20 02:42:06,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321503438] [2019-11-20 02:42:06,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:42:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 02:42:06,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:06,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:42:06,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-11-20 02:42:06,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990605105] [2019-11-20 02:42:06,752 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:42:06,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:42:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:42:06,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:42:06,753 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 Second operand 6 states. [2019-11-20 02:42:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:42:06,797 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2019-11-20 02:42:06,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 02:42:06,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2019-11-20 02:42:06,801 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:06,804 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2019-11-20 02:42:06,805 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2019-11-20 02:42:06,805 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2019-11-20 02:42:06,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2019-11-20 02:42:06,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:06,805 INFO L688 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2019-11-20 02:42:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2019-11-20 02:42:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-11-20 02:42:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-20 02:42:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2019-11-20 02:42:06,816 INFO L711 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2019-11-20 02:42:06,817 INFO L591 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2019-11-20 02:42:06,817 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 02:42:06,817 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2019-11-20 02:42:06,818 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 02:42:06,818 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:06,819 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:06,820 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:06,820 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:42:06,820 INFO L794 eck$LassoCheckResult]: Stem: 1471#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1472#L25 call main_#t~ret6 := rec2(main_~x~0);< 1479#rec2ENTRY ~j := #in~j; 1501#L18 assume !(~j <= 0); 1481#L20 call #t~ret3 := rec1(~j);< 1494#rec1ENTRY ~i := #in~i; 1491#L12 assume !(~i <= 0); 1440#L14 call #t~ret0 := rec1(~i - 2);< 1488#rec1ENTRY ~i := #in~i; 1486#L12 assume !(~i <= 0); 1437#L14 call #t~ret0 := rec1(~i - 2);< 1485#rec1ENTRY ~i := #in~i; 1487#L12 assume ~i <= 0;#res := 0; 1505#rec1FINAL assume true; 1496#rec1EXIT >#27#return; 1448#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1449#rec1ENTRY ~i := #in~i; 1508#L12 assume ~i <= 0;#res := 0; 1507#rec1FINAL assume true; 1506#rec1EXIT >#29#return; 1428#L14-2 call #t~ret2 := rec1(#t~ret1);< 1427#rec1ENTRY ~i := #in~i; 1429#L12 assume ~i <= 0;#res := 0; 1465#rec1FINAL assume true; 1467#rec1EXIT >#31#return; 1460#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1434#rec1FINAL assume true; 1444#rec1EXIT >#27#return; 1441#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1474#rec1ENTRY [2019-11-20 02:42:06,820 INFO L796 eck$LassoCheckResult]: Loop: 1474#rec1ENTRY ~i := #in~i; 1504#L12 assume !(~i <= 0); 1438#L14 call #t~ret0 := rec1(~i - 2);< 1474#rec1ENTRY [2019-11-20 02:42:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2019-11-20 02:42:06,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138739957] [2019-11-20 02:42:06,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,840 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,841 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2019-11-20 02:42:06,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133513364] [2019-11-20 02:42:06,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:06,846 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2019-11-20 02:42:06,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:06,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417280641] [2019-11-20 02:42:06,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-20 02:42:06,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417280641] [2019-11-20 02:42:06,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825458095] [2019-11-20 02:42:06,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:42:07,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:42:07,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:42:07,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-20 02:42:07,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:42:07,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-20 02:42:07,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186380791] [2019-11-20 02:42:07,039 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:07,039 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:07,039 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:07,039 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:07,039 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:42:07,039 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,040 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:07,040 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:07,040 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2019-11-20 02:42:07,040 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:07,040 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:07,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,097 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:07,097 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:07,101 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:07,104 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:07,104 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 36 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:07,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:07,111 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:07,111 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:07,115 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:07,118 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:07,118 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:07,123 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:07,123 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,129 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:42:07,130 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:07,135 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:42:07,136 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:07,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:07,136 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:07,137 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:07,137 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:42:07,137 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,137 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:07,137 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:07,137 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2019-11-20 02:42:07,137 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:07,137 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:07,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:07,184 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:07,184 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,192 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 [2019-11-20 02:42:07,193 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:07,193 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:07,193 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:07,193 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:07,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:07,194 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:07,194 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:07,195 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,203 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 [2019-11-20 02:42:07,205 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:07,205 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:07,206 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:07,206 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:07,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:07,207 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:07,207 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:07,208 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,216 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 [2019-11-20 02:42:07,218 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:07,218 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:07,218 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:07,218 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:07,218 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:07,220 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:07,220 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:07,224 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:42:07,225 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:42:07,226 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:07,231 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:42:07,231 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:42:07,231 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:42:07,231 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 02:42:07,233 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:42:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:07,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:07,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:07,410 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 [2019-11-20 02:42:07,410 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2019-11-20 02:42:07,483 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2019-11-20 02:42:07,484 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 [2019-11-20 02:42:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-20 02:42:07,484 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-20 02:42:07,484 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:07,485 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:42:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:07,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:07,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:07,632 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 [2019-11-20 02:42:07,632 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2019-11-20 02:42:07,703 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2019-11-20 02:42:07,704 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 [2019-11-20 02:42:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-20 02:42:07,704 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-20 02:42:07,704 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:07,705 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:42:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:07,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:07,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:07,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:07,855 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 [2019-11-20 02:42:07,856 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2019-11-20 02:42:07,973 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 156 states and 218 transitions. Complement of second has 13 states. [2019-11-20 02:42:07,975 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 [2019-11-20 02:42:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-20 02:42:07,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-20 02:42:07,977 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:07,977 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-20 02:42:07,977 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:07,977 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2019-11-20 02:42:07,978 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:07,978 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2019-11-20 02:42:07,981 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2019-11-20 02:42:07,991 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2019-11-20 02:42:07,993 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2019-11-20 02:42:07,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2019-11-20 02:42:07,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2019-11-20 02:42:07,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:07,996 INFO L688 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2019-11-20 02:42:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2019-11-20 02:42:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2019-11-20 02:42:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-20 02:42:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2019-11-20 02:42:08,016 INFO L711 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2019-11-20 02:42:08,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:42:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 02:42:08,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 02:42:08,017 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 8 states. [2019-11-20 02:42:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:42:08,105 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2019-11-20 02:42:08,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 02:42:08,106 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2019-11-20 02:42:08,108 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 02:42:08,109 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2019-11-20 02:42:08,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-11-20 02:42:08,109 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-11-20 02:42:08,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2019-11-20 02:42:08,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:42:08,109 INFO L688 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2019-11-20 02:42:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2019-11-20 02:42:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2019-11-20 02:42:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 02:42:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2019-11-20 02:42:08,113 INFO L711 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2019-11-20 02:42:08,113 INFO L591 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2019-11-20 02:42:08,113 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-20 02:42:08,113 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2019-11-20 02:42:08,114 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 02:42:08,114 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:42:08,114 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:42:08,118 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:42:08,118 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 02:42:08,119 INFO L794 eck$LassoCheckResult]: Stem: 2675#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2650#L25 call main_#t~ret6 := rec2(main_~x~0);< 2649#rec2ENTRY ~j := #in~j; 2651#L18 assume !(~j <= 0); 2679#L20 call #t~ret3 := rec1(~j);< 2690#rec1ENTRY ~i := #in~i; 2691#L12 assume !(~i <= 0); 2669#L14 call #t~ret0 := rec1(~i - 2);< 2688#rec1ENTRY ~i := #in~i; 2698#L12 assume ~i <= 0;#res := 0; 2701#rec1FINAL assume true; 2687#rec1EXIT >#27#return; 2661#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2660#rec1ENTRY ~i := #in~i; 2663#L12 assume ~i <= 0;#res := 0; 2664#rec1FINAL assume true; 2665#rec1EXIT >#29#return; 2684#L14-2 call #t~ret2 := rec1(#t~ret1);< 2673#rec1ENTRY ~i := #in~i; 2686#L12 assume ~i <= 0;#res := 0; 2685#rec1FINAL assume true; 2683#rec1EXIT >#31#return; 2682#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 2681#rec1FINAL assume true; 2680#rec1EXIT >#33#return; 2653#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2652#rec2ENTRY ~j := #in~j; 2655#L18 assume !(~j <= 0); 2659#L20 call #t~ret3 := rec1(~j);< 2656#rec1ENTRY [2019-11-20 02:42:08,119 INFO L796 eck$LassoCheckResult]: Loop: 2656#rec1ENTRY ~i := #in~i; 2658#L12 assume !(~i <= 0); 2657#L14 call #t~ret0 := rec1(~i - 2);< 2656#rec1ENTRY [2019-11-20 02:42:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2019-11-20 02:42:08,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:08,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808623905] [2019-11-20 02:42:08,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 02:42:08,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808623905] [2019-11-20 02:42:08,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333442901] [2019-11-20 02:42:08,207 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:42:08,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:42:08,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:42:08,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 02:42:08,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:42:08,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-20 02:42:08,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834266572] [2019-11-20 02:42:08,246 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:42:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2019-11-20 02:42:08,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:42:08,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45177096] [2019-11-20 02:42:08,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:42:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:42:08,250 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:42:08,285 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:08,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:08,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:08,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:08,285 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:42:08,285 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,285 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:08,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:08,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2019-11-20 02:42:08,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:08,286 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:08,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,332 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:08,332 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:08,340 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:08,340 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,347 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:08,347 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:08,356 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:08,356 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,365 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:08,365 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:42:08,371 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:08,371 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,379 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:08,379 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:08,384 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:08,387 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:42:08,387 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/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,391 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:42:08,392 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:42:08,399 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:42:08,404 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:42:08,406 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:42:08,406 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:42:08,406 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:42:08,406 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:42:08,406 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:42:08,406 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,406 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:42:08,406 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:42:08,406 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2019-11-20 02:42:08,406 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:42:08,406 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:42:08,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:42:08,438 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:42:08,438 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 51 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,448 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 [2019-11-20 02:42:08,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:08,450 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:08,450 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:08,450 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:08,450 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:08,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:08,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:08,452 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,456 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 [2019-11-20 02:42:08,457 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:08,457 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:08,457 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:08,457 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:08,457 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:08,457 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:08,458 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:08,459 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,463 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 [2019-11-20 02:42:08,464 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:08,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:08,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:08,465 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:08,465 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:08,465 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:08,466 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:08,467 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,471 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 [2019-11-20 02:42:08,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:08,472 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:08,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:08,473 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:08,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:08,473 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:08,473 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:08,474 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,478 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 [2019-11-20 02:42:08,479 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:42:08,480 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:42:08,480 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:42:08,480 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:42:08,480 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:42:08,481 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:42:08,481 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:42:08,483 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:42:08,484 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:42:08,485 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a437931-1130-4d22-ace2-8f3bdab5cf66/bin/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:42:08,487 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:42:08,487 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:42:08,487 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:42:08,488 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 02:42:08,489 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:42:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:08,596 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 [2019-11-20 02:42:08,596 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2019-11-20 02:42:08,661 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2019-11-20 02:42:08,662 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 [2019-11-20 02:42:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2019-11-20 02:42:08,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-20 02:42:08,663 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:08,663 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:42:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:08,764 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 [2019-11-20 02:42:08,764 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2019-11-20 02:42:08,826 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2019-11-20 02:42:08,827 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 [2019-11-20 02:42:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2019-11-20 02:42:08,828 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-20 02:42:08,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:08,828 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:42:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:42:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:42:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:42:08,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:42:08,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:42:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:42:08,940 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 [2019-11-20 02:42:08,940 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2019-11-20 02:42:09,031 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 77 states and 89 transitions. Complement of second has 13 states. [2019-11-20 02:42:09,033 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 [2019-11-20 02:42:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:42:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-20 02:42:09,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2019-11-20 02:42:09,034 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:09,034 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-20 02:42:09,034 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:09,035 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2019-11-20 02:42:09,035 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:42:09,035 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2019-11-20 02:42:09,037 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:42:09,037 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2019-11-20 02:42:09,037 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 02:42:09,037 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 02:42:09,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 02:42:09,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:42:09,038 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:42:09,038 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:42:09,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:42:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 02:42:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 02:42:09,039 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2019-11-20 02:42:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:42:09,039 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-20 02:42:09,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 02:42:09,039 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-20 02:42:09,040 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:42:09,040 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 02:42:09,040 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 02:42:09,040 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 02:42:09,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 02:42:09,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:42:09,041 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:42:09,041 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:42:09,041 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:42:09,041 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-20 02:42:09,041 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 02:42:09,041 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:42:09,041 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 02:42:09,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 02:42:09 BoogieIcfgContainer [2019-11-20 02:42:09,048 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 02:42:09,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:42:09,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:42:09,048 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:42:09,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:42:03" (3/4) ... [2019-11-20 02:42:09,052 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 02:42:09,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:42:09,054 INFO L168 Benchmark]: Toolchain (without parser) took 6482.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.3 MB). Free memory was 946.1 MB in the beginning and 865.6 MB in the end (delta: 80.5 MB). Peak memory consumption was 259.8 MB. Max. memory is 11.5 GB. [2019-11-20 02:42:09,054 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:42:09,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -183.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:42:09,055 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.53 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. [2019-11-20 02:42:09,056 INFO L168 Benchmark]: Boogie Preprocessor took 12.65 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. [2019-11-20 02:42:09,056 INFO L168 Benchmark]: RCFGBuilder took 217.08 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:42:09,057 INFO L168 Benchmark]: BuchiAutomizer took 5899.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 865.6 MB in the end (delta: 244.3 MB). Peak memory consumption was 291.5 MB. Max. memory is 11.5 GB. [2019-11-20 02:42:09,057 INFO L168 Benchmark]: Witness Printer took 4.34 ms. Allocated memory is still 1.2 GB. Free memory is still 865.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:42:09,059 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 314.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -183.5 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.53 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. * Boogie Preprocessor took 12.65 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 217.08 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5899.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.2 MB). Free memory was 1.1 GB in the beginning and 865.6 MB in the end (delta: 244.3 MB). Peak memory consumption was 291.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.34 ms. Allocated memory is still 1.2 GB. Free memory is still 865.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) 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. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.8s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 2.8s. Construction of modules took 0.5s. Büchi inclusion checks took 2.1s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 111 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 188 SDtfs, 186 SDslu, 297 SDs, 0 SdLazy, 307 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq151 hnf93 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...