./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 02:56:30,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:56:30,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:56:30,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:56:30,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:56:30,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:56:30,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:56:30,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:56:30,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:56:30,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:56:30,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:56:30,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:56:30,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:56:30,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:56:30,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:56:30,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:56:30,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:56:30,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:56:30,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:56:30,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:56:30,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:56:30,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:56:30,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:56:30,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:56:30,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:56:30,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:56:30,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:56:30,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:56:30,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:56:30,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:56:30,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:56:30,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:56:30,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:56:30,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:56:30,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:56:30,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:56:30,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:56:30,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:56:30,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:56:30,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:56:30,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:56:30,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 02:56:30,961 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:56:30,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:56:30,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:56:30,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:56:30,964 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:56:30,964 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 02:56:30,964 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 02:56:30,965 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 02:56:30,965 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 02:56:30,965 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 02:56:30,966 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 02:56:30,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:56:30,966 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:56:30,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:56:30,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:56:30,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 02:56:30,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 02:56:30,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 02:56:30,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 02:56:30,968 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 02:56:30,968 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:56:30,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 02:56:30,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:56:30,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:56:30,970 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 02:56:30,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:56:30,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:56:30,970 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 02:56:30,972 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 02:56:30,972 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2019-11-28 02:56:31,294 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:56:31,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:56:31,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:56:31,315 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:56:31,316 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:56:31,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2019-11-28 02:56:31,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed3927ce/44936e56b6074cbd8394eb870b812c11/FLAGadfadeda9 [2019-11-28 02:56:31,883 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:56:31,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2019-11-28 02:56:31,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed3927ce/44936e56b6074cbd8394eb870b812c11/FLAGadfadeda9 [2019-11-28 02:56:32,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed3927ce/44936e56b6074cbd8394eb870b812c11 [2019-11-28 02:56:32,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:56:32,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 02:56:32,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:32,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:56:32,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:56:32,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cf407f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32, skipping insertion in model container [2019-11-28 02:56:32,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:56:32,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:56:32,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:32,500 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:56:32,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:56:32,532 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:56:32,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32 WrapperNode [2019-11-28 02:56:32,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:56:32,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:32,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 02:56:32,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 02:56:32,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 02:56:32,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:56:32,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:56:32,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:56:32,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... [2019-11-28 02:56:32,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:56:32,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:56:32,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:56:32,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:56:32,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:32,709 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-28 02:56:32,710 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-28 02:56:32,710 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-28 02:56:32,710 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-28 02:56:32,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:56:32,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:56:32,886 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:56:32,887 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 02:56:32,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:32 BoogieIcfgContainer [2019-11-28 02:56:32,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:56:32,889 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 02:56:32,889 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 02:56:32,893 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 02:56:32,894 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:32,895 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:56:32" (1/3) ... [2019-11-28 02:56:32,896 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@787d9316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:32, skipping insertion in model container [2019-11-28 02:56:32,896 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:32,897 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:32" (2/3) ... [2019-11-28 02:56:32,897 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@787d9316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:56:32, skipping insertion in model container [2019-11-28 02:56:32,897 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:56:32,898 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:32" (3/3) ... [2019-11-28 02:56:32,899 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2019-11-28 02:56:32,982 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 02:56:32,982 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 02:56:32,982 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 02:56:32,983 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:56:32,983 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:56:32,983 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 02:56:32,983 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:56:32,984 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 02:56:33,004 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-28 02:56:33,040 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-28 02:56:33,040 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:33,040 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:33,050 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:33,050 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:33,050 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 02:56:33,051 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-28 02:56:33,054 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-28 02:56:33,054 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:33,054 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:33,055 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:56:33,055 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:33,061 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-28 02:56:33,062 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2019-11-28 02:56:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-28 02:56:33,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:33,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526689068] [2019-11-28 02:56:33,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,154 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2019-11-28 02:56:33,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:33,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367360487] [2019-11-28 02:56:33,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,175 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2019-11-28 02:56:33,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:33,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039219246] [2019-11-28 02:56:33,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:33,190 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:33,290 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:33,291 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:33,291 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:33,291 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:33,292 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:33,292 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,292 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:33,293 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:33,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2019-11-28 02:56:33,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:33,293 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:33,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,404 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:33,404 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:33,422 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,422 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:33,435 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,435 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,444 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:33,454 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:33,455 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:33,479 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:33,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:33,510 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:33,513 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:33,513 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:33,513 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:33,513 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:33,513 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:33,515 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,515 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:33,515 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:33,516 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2019-11-28 02:56:33,517 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:33,517 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:33,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:33,595 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:33,601 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,616 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,620 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,620 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,621 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,629 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:33,650 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:33,653 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:33,653 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:33,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:33,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:33,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:33,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:33,661 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:33,665 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:33,669 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:56:33,670 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 02:56:33,687 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:33,688 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:33,688 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:33,689 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-11-28 02:56:33,694 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:33,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:56:33,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:33,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:33,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:33,816 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 02:56:33,817 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2019-11-28 02:56:33,942 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2019-11-28 02:56:33,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 02:56:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-11-28 02:56:33,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-28 02:56:33,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:33,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 02:56:33,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:33,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-28 02:56:33,950 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:33,951 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2019-11-28 02:56:33,958 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 02:56:33,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2019-11-28 02:56:33,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-11-28 02:56:33,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2019-11-28 02:56:33,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2019-11-28 02:56:33,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:33,977 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-28 02:56:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2019-11-28 02:56:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-11-28 02:56:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 02:56:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-28 02:56:34,007 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-28 02:56:34,007 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-28 02:56:34,008 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 02:56:34,008 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2019-11-28 02:56:34,009 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 02:56:34,009 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:34,009 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:34,010 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:34,010 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:34,011 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2019-11-28 02:56:34,011 INFO L796 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2019-11-28 02:56:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2019-11-28 02:56:34,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484807166] [2019-11-28 02:56:34,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,028 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-28 02:56:34,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276826489] [2019-11-28 02:56:34,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,039 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2019-11-28 02:56:34,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260022375] [2019-11-28 02:56:34,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 02:56:34,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260022375] [2019-11-28 02:56:34,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:34,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 02:56:34,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321067747] [2019-11-28 02:56:34,187 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:34,187 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:34,187 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:34,187 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:34,187 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:34,187 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,188 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:34,188 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:34,188 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2019-11-28 02:56:34,188 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:34,188 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:34,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,246 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:34,247 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,261 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:34,261 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,278 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:34,280 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:56:34,347 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:34,350 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:34,350 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:34,350 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:34,351 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:34,351 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:34,351 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,351 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:34,351 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:34,351 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2019-11-28 02:56:34,351 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:34,352 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:34,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:34,416 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:34,416 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:34,430 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:34,432 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:34,432 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:34,432 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:34,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:34,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:34,434 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:34,434 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:34,441 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:34,444 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:34,444 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 02:56:34,452 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:34,452 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:34,453 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:34,453 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:34,455 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:56:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 02:56:34,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:34,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:34,616 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 02:56:34,616 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2019-11-28 02:56:34,719 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2019-11-28 02:56:34,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2019-11-28 02:56:34,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2019-11-28 02:56:34,723 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,724 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-28 02:56:34,724 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,724 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2019-11-28 02:56:34,724 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:34,725 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2019-11-28 02:56:34,728 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 02:56:34,730 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2019-11-28 02:56:34,731 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-11-28 02:56:34,731 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2019-11-28 02:56:34,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2019-11-28 02:56:34,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:34,732 INFO L688 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2019-11-28 02:56:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2019-11-28 02:56:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-11-28 02:56:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 02:56:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-11-28 02:56:34,739 INFO L711 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-11-28 02:56:34,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 02:56:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 02:56:34,743 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2019-11-28 02:56:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:34,795 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-28 02:56:34,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 02:56:34,796 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2019-11-28 02:56:34,798 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 02:56:34,800 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2019-11-28 02:56:34,800 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2019-11-28 02:56:34,801 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-28 02:56:34,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2019-11-28 02:56:34,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:34,801 INFO L688 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2019-11-28 02:56:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2019-11-28 02:56:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-28 02:56:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 02:56:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-28 02:56:34,807 INFO L711 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-28 02:56:34,807 INFO L591 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-28 02:56:34,807 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 02:56:34,807 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2019-11-28 02:56:34,808 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 02:56:34,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:56:34,809 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:56:34,810 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:56:34,810 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 02:56:34,810 INFO L794 eck$LassoCheckResult]: Stem: 347#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 324#L25 call main_#t~ret6 := rec2(main_~x~0);< 323#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 327#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 330#L18 assume !(~j <= 0); 328#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 329#L18 assume ~j <= 0;#res := 0; 340#rec2FINAL assume true; 341#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 331#rec1ENTRY ~i := #in~i; 333#L12 assume ~i <= 0;#res := 0; 344#rec1FINAL assume true; 345#rec1EXIT >#35#return; 346#L20-2 #res := #t~ret4 - 1;havoc #t~ret4;havoc #t~ret3; 348#rec2FINAL assume true; 350#rec2EXIT >#33#return; 337#L20-1 call #t~ret4 := rec1(#t~ret3);< 342#rec1ENTRY [2019-11-28 02:56:34,811 INFO L796 eck$LassoCheckResult]: Loop: 342#rec1ENTRY ~i := #in~i; 349#L12 assume !(~i <= 0); 335#L14 call #t~ret0 := rec1(~i - 2);< 342#rec1ENTRY [2019-11-28 02:56:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2019-11-28 02:56:34,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319612556] [2019-11-28 02:56:34,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,836 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-28 02:56:34,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857319454] [2019-11-28 02:56:34,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:56:34,843 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:56:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2019-11-28 02:56:34,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:56:34,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930675505] [2019-11-28 02:56:34,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:56:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 02:56:35,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930675505] [2019-11-28 02:56:35,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:56:35,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-28 02:56:35,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745973986] [2019-11-28 02:56:35,037 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:35,038 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:35,038 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:35,038 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:35,038 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:56:35,038 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,039 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:35,039 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:35,039 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2019-11-28 02:56:35,039 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:35,039 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:35,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,097 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:35,097 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,103 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,104 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,107 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:35,107 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,126 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,129 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:35,129 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,147 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,150 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:35,151 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,167 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,168 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,172 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:35,173 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,189 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,189 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,193 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:56:35,193 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:56:35,212 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,233 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:56:35,233 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,300 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:56:35,303 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:56:35,303 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:56:35,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:56:35,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:56:35,303 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:56:35,304 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,304 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:56:35,304 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:56:35,304 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2019-11-28 02:56:35,304 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:56:35,304 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:56:35,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:56:35,362 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:56:35,362 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,376 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:35,378 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:35,378 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:35,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:35,379 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:35,379 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:35,380 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:35,380 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:35,382 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:35,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:35,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:35,393 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:35,393 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:35,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:35,394 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:35,395 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,403 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:35,405 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:35,405 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:35,405 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:35,406 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:35,406 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:35,407 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:35,407 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:56:35,408 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,422 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:35,426 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:35,426 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:35,427 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:35,427 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:35,427 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:35,428 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:35,429 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,435 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,445 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 02:56:35,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:56:35,448 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:56:35,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:56:35,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:56:35,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:56:35,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:56:35,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,463 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:56:35,467 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 02:56:35,467 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:56:35,474 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:56:35,474 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:56:35,474 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:56:35,475 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-28 02:56:35,488 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:56:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:56:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:35,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:35,649 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 02:56:35,649 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-11-28 02:56:35,720 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2019-11-28 02:56:35,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-11-28 02:56:35,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2019-11-28 02:56:35,723 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:35,723 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:35,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:35,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:35,849 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 02:56:35,849 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-11-28 02:56:35,911 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2019-11-28 02:56:35,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-11-28 02:56:35,912 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2019-11-28 02:56:35,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:35,913 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:56:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:56:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:35,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 02:56:35,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:35,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:35,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 02:56:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:56:36,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:56:36,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:56:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:56:36,030 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 02:56:36,030 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-11-28 02:56:36,158 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2019-11-28 02:56:36,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 02:56:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 02:56:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2019-11-28 02:56:36,159 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2019-11-28 02:56:36,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:36,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2019-11-28 02:56:36,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:36,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2019-11-28 02:56:36,161 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:56:36,161 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2019-11-28 02:56:36,167 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 02:56:36,172 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2019-11-28 02:56:36,172 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2019-11-28 02:56:36,172 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2019-11-28 02:56:36,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2019-11-28 02:56:36,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:56:36,173 INFO L688 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-11-28 02:56:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2019-11-28 02:56:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-28 02:56:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 02:56:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-28 02:56:36,183 INFO L711 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-28 02:56:36,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:56:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 02:56:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-28 02:56:36,184 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2019-11-28 02:56:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:56:36,238 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-28 02:56:36,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 02:56:36,239 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2019-11-28 02:56:36,241 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:36,241 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2019-11-28 02:56:36,241 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 02:56:36,241 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 02:56:36,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 02:56:36,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:56:36,242 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:36,242 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:36,242 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:56:36,242 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 02:56:36,242 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 02:56:36,242 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:56:36,242 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 02:56:36,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:56:36 BoogieIcfgContainer [2019-11-28 02:56:36,248 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 02:56:36,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:56:36,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:56:36,249 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:56:36,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:32" (3/4) ... [2019-11-28 02:56:36,253 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 02:56:36,253 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:56:36,256 INFO L168 Benchmark]: Toolchain (without parser) took 3998.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.7 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -132.8 MB). Peak memory consumption was 75.8 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:36,257 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:36,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.13 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:36,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.26 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:36,259 INFO L168 Benchmark]: Boogie Preprocessor took 78.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -179.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:36,259 INFO L168 Benchmark]: RCFGBuilder took 240.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:36,260 INFO L168 Benchmark]: BuchiAutomizer took 3359.08 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 81.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 99.3 MB. Max. memory is 11.5 GB. [2019-11-28 02:56:36,261 INFO L168 Benchmark]: Witness Printer took 4.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:56:36,265 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 273.13 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.26 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -179.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 240.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3359.08 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 81.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 99.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * 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 3.3s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 1.7s. Construction of modules took 0.1s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 126 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq153 hnf94 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 27ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...