./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:18:16,831 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:18:16,833 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:18:16,842 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:18:16,842 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:18:16,843 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:18:16,844 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:18:16,845 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:18:16,846 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:18:16,847 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:18:16,847 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:18:16,847 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:18:16,848 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:18:16,849 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:18:16,849 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:18:16,850 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:18:16,851 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:18:16,852 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:18:16,853 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:18:16,854 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:18:16,855 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:18:16,856 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:18:16,857 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:18:16,858 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:18:16,858 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:18:16,859 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:18:16,859 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:18:16,860 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:18:16,860 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:18:16,861 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:18:16,861 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:18:16,862 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:18:16,862 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:18:16,862 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:18:16,863 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:18:16,863 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:18:16,863 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-28 12:18:16,874 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:18:16,874 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:18:16,875 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:18:16,876 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:18:16,876 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:18:16,876 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 12:18:16,876 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 12:18:16,876 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 12:18:16,876 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 12:18:16,876 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 12:18:16,877 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 12:18:16,877 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:18:16,877 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 12:18:16,877 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:18:16,877 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:18:16,877 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 12:18:16,877 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 12:18:16,878 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 12:18:16,878 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:18:16,878 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 12:18:16,878 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:18:16,878 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 12:18:16,878 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:18:16,878 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:18:16,879 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 12:18:16,879 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:18:16,879 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:18:16,879 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 12:18:16,880 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 12:18:16,880 INFO L133 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2018-11-28 12:18:16,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:18:16,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:18:16,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:18:16,915 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:18:16,916 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:18:16,916 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 12:18:16,953 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/data/c0f9f6b03/f37aedb98c994f46823b92f0b7d176f0/FLAG940372e36 [2018-11-28 12:18:17,294 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:18:17,294 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 12:18:17,299 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/data/c0f9f6b03/f37aedb98c994f46823b92f0b7d176f0/FLAG940372e36 [2018-11-28 12:18:17,731 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/data/c0f9f6b03/f37aedb98c994f46823b92f0b7d176f0 [2018-11-28 12:18:17,733 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:18:17,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:18:17,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:18:17,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:18:17,737 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:18:17,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f60a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17, skipping insertion in model container [2018-11-28 12:18:17,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:18:17,752 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:18:17,846 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:18:17,849 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:18:17,858 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:18:17,866 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:18:17,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17 WrapperNode [2018-11-28 12:18:17,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:18:17,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:18:17,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:18:17,867 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:18:17,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:18:17,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:18:17,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:18:17,886 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:18:17,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... [2018-11-28 12:18:17,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:18:17,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:18:17,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:18:17,895 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:18:17,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-28 12:18:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-28 12:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-28 12:18:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-28 12:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:18:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:18:18,058 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:18:18,058 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-28 12:18:18,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:18:18 BoogieIcfgContainer [2018-11-28 12:18:18,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:18:18,059 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 12:18:18,059 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 12:18:18,062 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 12:18:18,063 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 12:18:18,063 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 12:18:17" (1/3) ... [2018-11-28 12:18:18,064 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@76814e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 12:18:18, skipping insertion in model container [2018-11-28 12:18:18,064 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 12:18:18,064 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:18:17" (2/3) ... [2018-11-28 12:18:18,064 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@76814e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 12:18:18, skipping insertion in model container [2018-11-28 12:18:18,064 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 12:18:18,064 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:18:18" (3/3) ... [2018-11-28 12:18:18,066 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 12:18:18,108 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:18:18,109 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 12:18:18,109 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 12:18:18,109 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 12:18:18,109 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:18:18,109 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:18:18,109 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 12:18:18,109 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:18:18,109 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 12:18:18,119 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-28 12:18:18,135 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-28 12:18:18,135 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:18:18,135 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:18:18,140 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 12:18:18,141 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:18:18,141 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 12:18:18,141 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-28 12:18:18,143 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-28 12:18:18,143 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:18:18,143 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:18:18,144 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 12:18:18,144 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:18:18,151 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-28 12:18:18,151 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2018-11-28 12:18:18,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-11-28 12:18:18,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:18,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:18,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:18,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2018-11-28 12:18:18,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:18,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:18,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:18,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2018-11-28 12:18:18,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:18,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:18,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:18,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,283 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:18:18,284 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:18:18,284 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:18:18,285 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:18:18,285 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:18:18,285 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,285 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:18:18,285 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:18:18,285 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-28 12:18:18,285 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:18:18,286 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:18:18,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,364 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:18:18,364 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:18,370 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:18,379 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:18,379 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,396 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:18,396 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:18,398 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:18,398 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,413 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:18,413 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:18,415 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:18,415 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,432 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:18,432 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,452 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:18:18,452 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:18,469 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 12:18:18,470 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:18:18,470 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:18:18,470 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:18:18,471 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:18:18,471 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:18:18,471 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,471 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:18:18,471 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:18:18,471 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-28 12:18:18,471 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:18:18,471 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:18:18,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,528 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:18:18,533 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:18:18,534 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:18,535 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:18,535 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:18,536 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:18,536 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:18,536 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:18,538 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:18,538 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:18,542 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:18:18,542 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:18,543 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:18,543 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:18,543 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:18,543 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:18,543 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:18,544 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:18,544 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:18,549 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:18:18,552 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 12:18:18,552 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 12:18:18,553 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:18:18,553 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:18:18,554 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:18:18,554 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-28 12:18:18,555 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:18:18,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:18,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:18,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:18:18,662 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-28 12:18:18,663 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2018-11-28 12:18:18,726 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2018-11-28 12:18:18,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 12:18:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 12:18:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-11-28 12:18:18,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2018-11-28 12:18:18,730 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:18,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2018-11-28 12:18:18,730 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:18,730 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2018-11-28 12:18:18,730 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:18,731 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2018-11-28 12:18:18,733 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 12:18:18,738 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2018-11-28 12:18:18,738 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-11-28 12:18:18,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-28 12:18:18,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2018-11-28 12:18:18,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:18:18,740 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2018-11-28 12:18:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2018-11-28 12:18:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-11-28 12:18:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-28 12:18:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2018-11-28 12:18:18,760 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2018-11-28 12:18:18,760 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2018-11-28 12:18:18,760 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 12:18:18,760 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2018-11-28 12:18:18,761 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 12:18:18,761 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:18:18,762 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:18:18,762 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:18:18,762 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:18:18,762 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2018-11-28 12:18:18,763 INFO L796 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2018-11-28 12:18:18,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2018-11-28 12:18:18,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:18,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:18,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:18,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-11-28 12:18:18,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:18,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:18,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:18,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:18,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2018-11-28 12:18:18,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:18,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:18,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:18,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:18:18,823 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:18:18,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:18:18,848 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:18:18,848 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:18:18,848 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:18:18,848 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:18:18,848 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:18:18,848 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,848 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:18:18,848 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:18:18,848 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-28 12:18:18,848 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:18:18,848 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:18:18,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,892 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:18:18,892 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:18,907 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,925 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:18:18,926 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:18,951 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 12:18:18,952 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:18:18,952 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:18:18,952 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:18:18,952 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:18:18,952 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:18:18,952 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:18,953 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:18:18,953 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:18:18,953 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-28 12:18:18,953 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:18:18,953 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:18:18,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:18,989 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:18:18,989 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:18:18,989 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:18,990 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:18,990 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:18,990 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:18,991 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:18,991 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:18,991 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:18,992 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:18,996 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:18:18,998 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-28 12:18:18,998 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:18:18,999 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:18:18,999 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:18:18,999 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:18:18,999 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-28 12:18:18,999 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:18:19,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:18:19,072 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 12:18:19,072 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2018-11-28 12:18:19,133 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2018-11-28 12:18:19,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 12:18:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:18:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2018-11-28 12:18:19,135 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2018-11-28 12:18:19,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-28 12:18:19,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,137 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2018-11-28 12:18:19,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,137 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2018-11-28 12:18:19,139 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 12:18:19,140 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2018-11-28 12:18:19,140 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-28 12:18:19,140 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-11-28 12:18:19,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2018-11-28 12:18:19,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:18:19,141 INFO L705 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2018-11-28 12:18:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2018-11-28 12:18:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-28 12:18:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 12:18:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2018-11-28 12:18:19,144 INFO L728 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2018-11-28 12:18:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:18:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:18:19,147 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2018-11-28 12:18:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:18:19,187 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2018-11-28 12:18:19,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:18:19,188 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2018-11-28 12:18:19,189 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 12:18:19,191 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2018-11-28 12:18:19,191 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-11-28 12:18:19,191 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-11-28 12:18:19,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2018-11-28 12:18:19,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:18:19,191 INFO L705 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2018-11-28 12:18:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2018-11-28 12:18:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-11-28 12:18:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 12:18:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2018-11-28 12:18:19,196 INFO L728 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-11-28 12:18:19,196 INFO L608 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-11-28 12:18:19,196 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 12:18:19,196 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2018-11-28 12:18:19,197 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 12:18:19,197 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 12:18:19,197 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 12:18:19,198 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:18:19,198 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 12:18:19,199 INFO L794 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 320#L25 call main_#t~ret6 := rec2(main_~x~0);< 319#rec2ENTRY ~j := #in~j; 321#L18 assume !(~j <= 0); 323#L20 call #t~ret3 := rec2(~j - 1);< 322#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 324#L20 call #t~ret3 := rec2(~j - 1);< 322#rec2ENTRY ~j := #in~j; 326#L18 assume ~j <= 0;#res := 0; 336#rec2FINAL assume true; 337#rec2EXIT >#33#return; 328#L20-1 call #t~ret4 := rec1(#t~ret3);< 327#rec1ENTRY ~i := #in~i; 329#L12 assume ~i <= 0;#res := 0; 340#rec1FINAL assume true; 341#rec1EXIT >#35#return; 342#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 344#rec2FINAL assume true; 346#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 338#rec1ENTRY [2018-11-28 12:18:19,199 INFO L796 eck$LassoCheckResult]: Loop: 338#rec1ENTRY ~i := #in~i; 345#L12 assume !(~i <= 0); 334#L14 call #t~ret0 := rec1(~i - 2);< 338#rec1ENTRY [2018-11-28 12:18:19,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2018-11-28 12:18:19,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:19,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:19,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:19,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:19,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:19,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-11-28 12:18:19,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:19,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:19,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:19,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:18:19,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:18:19,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2018-11-28 12:18:19,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:18:19,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:18:19,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:19,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:18:19,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:18:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 12:18:19,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:18:19,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-28 12:18:19,308 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:18:19,308 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:18:19,308 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:18:19,308 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:18:19,308 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 12:18:19,309 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,309 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:18:19,309 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:18:19,309 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-28 12:18:19,309 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:18:19,309 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:18:19,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,340 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:18:19,341 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,348 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:19,348 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:19,351 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:19,351 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,366 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:19,366 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:19,372 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:19,372 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,386 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:19,386 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:19,389 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:19,389 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:19,404 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:19,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:19,405 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,420 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:19,420 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:19,422 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 12:18:19,422 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,437 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 12:18:19,437 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be20bd4-8cb7-4a75-8e2c-ef67a6b37162/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,455 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 12:18:19,455 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 12:18:19,471 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 12:18:19,473 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 12:18:19,473 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 12:18:19,473 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 12:18:19,473 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 12:18:19,473 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 12:18:19,473 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 12:18:19,473 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 12:18:19,473 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 12:18:19,473 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-28 12:18:19,474 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 12:18:19,474 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 12:18:19,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 12:18:19,503 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 12:18:19,503 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 12:18:19,504 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:19,504 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:19,505 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:19,505 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:19,505 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:19,505 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:19,505 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:19,506 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:19,507 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:18:19,507 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:19,507 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:19,507 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:19,508 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:19,508 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:19,508 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:19,508 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:19,509 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:19,510 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:18:19,510 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:19,510 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:19,511 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:19,511 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:19,511 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:19,511 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:19,511 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:19,512 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:19,512 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:18:19,513 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:19,513 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:19,513 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:19,513 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:19,513 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:19,513 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:19,514 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:19,514 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:19,514 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 12:18:19,515 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 12:18:19,515 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 12:18:19,515 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 12:18:19,515 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 12:18:19,515 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 12:18:19,516 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 12:18:19,516 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 12:18:19,516 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 12:18:19,519 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 12:18:19,521 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-28 12:18:19,521 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 12:18:19,521 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 12:18:19,521 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 12:18:19,522 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 12:18:19,522 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-28 12:18:19,522 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 12:18:19,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:18:19,590 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 12:18:19,590 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-28 12:18:19,628 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2018-11-28 12:18:19,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 12:18:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:18:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2018-11-28 12:18:19,630 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2018-11-28 12:18:19,630 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,630 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:18:19,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:18:19,694 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 12:18:19,694 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-28 12:18:19,725 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2018-11-28 12:18:19,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 12:18:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:18:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2018-11-28 12:18:19,726 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2018-11-28 12:18:19,726 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,726 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 12:18:19,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:18:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:18:19,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:18:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:18:19,816 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 12:18:19,816 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-28 12:18:19,865 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2018-11-28 12:18:19,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 12:18:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 12:18:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2018-11-28 12:18:19,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2018-11-28 12:18:19,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2018-11-28 12:18:19,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2018-11-28 12:18:19,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 12:18:19,867 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2018-11-28 12:18:19,868 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-28 12:18:19,869 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2018-11-28 12:18:19,869 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2018-11-28 12:18:19,869 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2018-11-28 12:18:19,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2018-11-28 12:18:19,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 12:18:19,870 INFO L705 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2018-11-28 12:18:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2018-11-28 12:18:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-28 12:18:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 12:18:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2018-11-28 12:18:19,873 INFO L728 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2018-11-28 12:18:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:18:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:18:19,873 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2018-11-28 12:18:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:18:19,900 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-28 12:18:19,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:18:19,900 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2018-11-28 12:18:19,901 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 12:18:19,901 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2018-11-28 12:18:19,901 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 12:18:19,901 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 12:18:19,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 12:18:19,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 12:18:19,902 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:18:19,902 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:18:19,902 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:18:19,902 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 12:18:19,902 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:18:19,902 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 12:18:19,902 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-28 12:18:19,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 12:18:19 BoogieIcfgContainer [2018-11-28 12:18:19,906 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-28 12:18:19,906 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:18:19,906 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:18:19,906 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:18:19,907 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:18:18" (3/4) ... [2018-11-28 12:18:19,909 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 12:18:19,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:18:19,909 INFO L168 Benchmark]: Toolchain (without parser) took 2176.03 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 222.3 MB). Free memory was 958.7 MB in the beginning and 1.2 GB in the end (delta: -219.7 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. [2018-11-28 12:18:19,910 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:18:19,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.27 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-28 12:18:19,911 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.03 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:18:19,911 INFO L168 Benchmark]: Boogie Preprocessor took 9.00 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:18:19,911 INFO L168 Benchmark]: RCFGBuilder took 163.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -191.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:18:19,911 INFO L168 Benchmark]: BuchiAutomizer took 1846.91 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -46.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2018-11-28 12:18:19,912 INFO L168 Benchmark]: Witness Printer took 2.67 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2018-11-28 12:18:19,913 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.27 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.03 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.00 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 163.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -191.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1846.91 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -46.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.67 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.8s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 0.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 125 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...