./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 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 f5c626d5135dc189cbc332c41f07b76804a58f47ee910790099695b0d83f1587 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 01:24:35,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 01:24:35,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 01:24:35,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 01:24:35,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 01:24:35,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 01:24:35,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 01:24:35,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 01:24:35,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 01:24:35,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 01:24:35,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 01:24:35,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 01:24:35,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 01:24:35,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 01:24:35,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 01:24:35,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 01:24:35,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 01:24:35,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 01:24:35,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 01:24:35,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 01:24:35,356 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 01:24:35,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 01:24:35,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 01:24:35,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 01:24:35,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 01:24:35,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 01:24:35,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 01:24:35,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 01:24:35,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 01:24:35,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 01:24:35,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 01:24:35,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 01:24:35,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 01:24:35,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 01:24:35,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 01:24:35,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 01:24:35,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 01:24:35,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 01:24:35,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 01:24:35,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 01:24:35,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 01:24:35,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 01:24:35,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-07-22 01:24:35,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 01:24:35,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 01:24:35,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 01:24:35,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 01:24:35,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 01:24:35,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 01:24:35,416 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 01:24:35,416 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 01:24:35,416 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 01:24:35,417 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 01:24:35,417 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 01:24:35,417 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 01:24:35,417 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 01:24:35,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 01:24:35,418 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 01:24:35,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 01:24:35,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 01:24:35,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 01:24:35,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 01:24:35,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 01:24:35,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 01:24:35,424 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 01:24:35,424 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 01:24:35,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 01:24:35,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 01:24:35,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 01:24:35,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 01:24:35,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 01:24:35,427 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 01:24:35,428 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5c626d5135dc189cbc332c41f07b76804a58f47ee910790099695b0d83f1587 [2022-07-22 01:24:35,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 01:24:35,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 01:24:35,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 01:24:35,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 01:24:35,757 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 01:24:35,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2022-07-22 01:24:35,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dbfc8581/4f23b55d0a0547729cf9fcbd881479ad/FLAG36f62e272 [2022-07-22 01:24:36,213 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 01:24:36,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2022-07-22 01:24:36,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dbfc8581/4f23b55d0a0547729cf9fcbd881479ad/FLAG36f62e272 [2022-07-22 01:24:36,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dbfc8581/4f23b55d0a0547729cf9fcbd881479ad [2022-07-22 01:24:36,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 01:24:36,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 01:24:36,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 01:24:36,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 01:24:36,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 01:24:36,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bd73be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36, skipping insertion in model container [2022-07-22 01:24:36,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 01:24:36,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 01:24:36,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:24:36,762 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 01:24:36,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:24:36,784 INFO L208 MainTranslator]: Completed translation [2022-07-22 01:24:36,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36 WrapperNode [2022-07-22 01:24:36,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 01:24:36,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 01:24:36,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 01:24:36,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 01:24:36,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,829 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-07-22 01:24:36,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 01:24:36,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 01:24:36,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 01:24:36,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 01:24:36,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 01:24:36,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 01:24:36,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 01:24:36,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 01:24:36,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (1/1) ... [2022-07-22 01:24:36,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:36,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:36,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:36,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 01:24:36,939 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-07-22 01:24:36,940 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-07-22 01:24:36,940 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-07-22 01:24:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-07-22 01:24:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 01:24:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 01:24:36,989 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 01:24:36,991 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 01:24:37,110 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 01:24:37,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 01:24:37,118 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 01:24:37,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:24:37 BoogieIcfgContainer [2022-07-22 01:24:37,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 01:24:37,121 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 01:24:37,121 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 01:24:37,123 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 01:24:37,124 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:24:37,124 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 01:24:36" (1/3) ... [2022-07-22 01:24:37,125 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7118a1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:24:37, skipping insertion in model container [2022-07-22 01:24:37,125 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:24:37,125 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:24:36" (2/3) ... [2022-07-22 01:24:37,126 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7118a1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:24:37, skipping insertion in model container [2022-07-22 01:24:37,126 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:24:37,126 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:24:37" (3/3) ... [2022-07-22 01:24:37,127 INFO L354 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2022-07-22 01:24:37,187 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 01:24:37,188 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-22 01:24:37,188 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 01:24:37,188 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 01:24:37,188 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 01:24:37,188 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-22 01:24:37,189 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 01:24:37,189 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 01:24:37,192 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 01:24:37,215 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2022-07-22 01:24:37,216 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:24:37,216 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:24:37,222 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 01:24:37,222 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:24:37,222 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 01:24:37,222 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 01:24:37,228 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2022-07-22 01:24:37,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:24:37,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:24:37,229 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 01:24:37,229 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:24:37,234 INFO L752 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 9#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 16#rec2ENTRYtrue [2022-07-22 01:24:37,235 INFO L754 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec2(~j - 1);< 16#rec2ENTRYtrue [2022-07-22 01:24:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2022-07-22 01:24:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:37,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122648980] [2022-07-22 01:24:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:37,332 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:37,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash 39868, now seen corresponding path program 1 times [2022-07-22 01:24:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689083788] [2022-07-22 01:24:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:37,375 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:37,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1451963835, now seen corresponding path program 1 times [2022-07-22 01:24:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:37,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316883304] [2022-07-22 01:24:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:37,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:37,406 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:37,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:37,544 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:24:37,544 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:24:37,544 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:24:37,545 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:24:37,545 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:24:37,545 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,545 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:24:37,545 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:24:37,546 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2022-07-22 01:24:37,546 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:24:37,546 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:24:37,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,627 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:24:37,627 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:24:37,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:37,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:37,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:37,643 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:37,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-07-22 01:24:37,669 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:37,669 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:37,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:37,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-07-22 01:24:37,699 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:37,700 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:37,721 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:37,721 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:37,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:37,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:37,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-07-22 01:24:37,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:37,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:37,763 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:37,763 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:37,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:37,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:37,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:37,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:37,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:37,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-07-22 01:24:37,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:37,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:37,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2022-07-22 01:24:37,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:37,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:37,846 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:37,846 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:37,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-07-22 01:24:37,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:37,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:37,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:37,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:24:37,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:37,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-07-22 01:24:37,935 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:24:37,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:37,940 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:24:37,940 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:24:37,940 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:24:37,940 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:24:37,940 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:24:37,940 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:37,940 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:24:37,940 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:24:37,940 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2022-07-22 01:24:37,940 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:24:37,940 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:24:37,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:37,967 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,009 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:24:38,013 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:24:38,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,084 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:38,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-07-22 01:24:38,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:38,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:38,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:38,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:38,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:38,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:38,093 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:38,103 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:24:38,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-07-22 01:24:38,122 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:38,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:38,129 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:38,129 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:38,129 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:38,129 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:38,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:38,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:38,143 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:24:38,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-07-22 01:24:38,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,160 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-22 01:24:38,162 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:38,168 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:38,168 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:38,168 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:38,168 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:38,168 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:38,170 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:38,170 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:38,185 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:24:38,193 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:24:38,193 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:24:38,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,202 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:24:38,202 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:24:38,202 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:24:38,203 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2022-07-22 01:24:38,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-07-22 01:24:38,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,229 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:24:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:24:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:24:38,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:38,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:24:38,356 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 [2022-07-22 01:24:38,357 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:24:38,424 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6). Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 37 states and 45 transitions. Complement of second has 12 states. [2022-07-22 01:24:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 01:24:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 01:24:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2022-07-22 01:24:38,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2022-07-22 01:24:38,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:38,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2022-07-22 01:24:38,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:38,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2022-07-22 01:24:38,437 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:38,437 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 45 transitions. [2022-07-22 01:24:38,444 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:24:38,448 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 24 states and 31 transitions. [2022-07-22 01:24:38,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2022-07-22 01:24:38,449 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2022-07-22 01:24:38,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 31 transitions. [2022-07-22 01:24:38,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:24:38,450 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-22 01:24:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 31 transitions. [2022-07-22 01:24:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-07-22 01:24:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 01:24:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-07-22 01:24:38,470 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-07-22 01:24:38,470 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-07-22 01:24:38,470 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-22 01:24:38,470 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 25 transitions. [2022-07-22 01:24:38,471 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:24:38,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:24:38,471 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:24:38,471 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 01:24:38,472 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:24:38,472 INFO L752 eck$LassoCheckResult]: Stem: 118#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 119#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 113#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 126#rec2ENTRY ~j := #in~j; 128#L18 assume !(~j <= 0); 114#L20 call #t~ret3 := rec2(~j - 1);< 129#rec2ENTRY ~j := #in~j; 130#L18 assume ~j <= 0;#res := 0; 117#rec2FINAL assume true; 116#rec2EXIT >#34#return; 112#L20-1 call #t~ret4 := rec1(#t~ret3);< 115#rec1ENTRY [2022-07-22 01:24:38,472 INFO L754 eck$LassoCheckResult]: Loop: 115#rec1ENTRY ~i := #in~i; 131#L12 assume !(~i <= 0); 122#L14 call #t~ret0 := rec1(~i - 2);< 115#rec1ENTRY [2022-07-22 01:24:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1193590059, now seen corresponding path program 1 times [2022-07-22 01:24:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:38,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027523249] [2022-07-22 01:24:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:38,479 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:38,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2022-07-22 01:24:38,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:38,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955905403] [2022-07-22 01:24:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:38,490 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:38,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -207203934, now seen corresponding path program 1 times [2022-07-22 01:24:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:38,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228541895] [2022-07-22 01:24:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:38,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 01:24:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 01:24:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:24:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228541895] [2022-07-22 01:24:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228541895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 01:24:38,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 01:24:38,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 01:24:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674134819] [2022-07-22 01:24:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 01:24:38,581 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:24:38,581 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:24:38,581 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:24:38,581 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:24:38,582 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:24:38,582 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,582 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:24:38,582 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:24:38,582 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2022-07-22 01:24:38,582 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:24:38,582 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:24:38,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,630 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:24:38,631 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:24:38,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-07-22 01:24:38,635 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:38,635 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:38,651 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:38,652 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:38,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-07-22 01:24:38,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:38,676 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:38,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-07-22 01:24:38,702 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:24:38,702 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:38,762 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:24:38,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,765 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:24:38,765 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:24:38,765 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:24:38,765 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:24:38,765 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:24:38,765 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,765 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:24:38,766 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:24:38,766 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2022-07-22 01:24:38,766 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:24:38,766 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:24:38,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:38,836 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:24:38,836 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:24:38,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,840 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,851 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:38,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-07-22 01:24:38,860 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:38,860 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:38,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:38,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:38,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:38,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:38,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:38,863 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:24:38,864 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 01:24:38,864 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:24:38,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:38,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:38,866 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:38,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-22 01:24:38,868 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:24:38,868 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:24:38,868 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:24:38,868 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-07-22 01:24:38,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:38,886 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:24:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 01:24:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:39,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:24:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:24:39,086 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 [2022-07-22 01:24:39,086 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7 Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 01:24:39,148 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 44 states and 59 transitions. Complement of second has 14 states. [2022-07-22 01:24:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 01:24:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 01:24:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2022-07-22 01:24:39,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 11 letters. Loop has 3 letters. [2022-07-22 01:24:39,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:39,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 14 letters. Loop has 3 letters. [2022-07-22 01:24:39,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:39,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 11 letters. Loop has 6 letters. [2022-07-22 01:24:39,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:39,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 59 transitions. [2022-07-22 01:24:39,154 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:24:39,156 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 38 states and 51 transitions. [2022-07-22 01:24:39,156 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-07-22 01:24:39,157 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2022-07-22 01:24:39,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 51 transitions. [2022-07-22 01:24:39,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:24:39,157 INFO L369 hiAutomatonCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-07-22 01:24:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 51 transitions. [2022-07-22 01:24:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-07-22 01:24:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-22 01:24:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-07-22 01:24:39,162 INFO L392 hiAutomatonCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-07-22 01:24:39,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:24:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 01:24:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 01:24:39,165 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 01:24:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:24:39,202 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-07-22 01:24:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 01:24:39,203 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 44 transitions. [2022-07-22 01:24:39,204 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:24:39,205 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 32 states and 41 transitions. [2022-07-22 01:24:39,205 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 27 [2022-07-22 01:24:39,206 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2022-07-22 01:24:39,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 41 transitions. [2022-07-22 01:24:39,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:24:39,206 INFO L369 hiAutomatonCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-22 01:24:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states and 41 transitions. [2022-07-22 01:24:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-07-22 01:24:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-22 01:24:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-22 01:24:39,210 INFO L392 hiAutomatonCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-22 01:24:39,210 INFO L374 stractBuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-22 01:24:39,210 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-22 01:24:39,210 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 35 transitions. [2022-07-22 01:24:39,211 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:24:39,211 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:24:39,211 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:24:39,212 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 01:24:39,212 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-07-22 01:24:39,212 INFO L752 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 344#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 337#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 352#rec2ENTRY ~j := #in~j; 355#L18 assume !(~j <= 0); 336#L20 call #t~ret3 := rec2(~j - 1);< 356#rec2ENTRY ~j := #in~j; 358#L18 assume !(~j <= 0); 338#L20 call #t~ret3 := rec2(~j - 1);< 356#rec2ENTRY ~j := #in~j; 357#L18 assume ~j <= 0;#res := 0; 340#rec2FINAL assume true; 341#rec2EXIT >#34#return; 342#L20-1 call #t~ret4 := rec1(#t~ret3);< 361#rec1ENTRY ~i := #in~i; 359#L12 assume ~i <= 0;#res := 0; 360#rec1FINAL assume true; 354#rec1EXIT >#36#return; 345#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 346#rec2FINAL assume true; 363#rec2EXIT >#34#return; 335#L20-1 call #t~ret4 := rec1(#t~ret3);< 339#rec1ENTRY [2022-07-22 01:24:39,212 INFO L754 eck$LassoCheckResult]: Loop: 339#rec1ENTRY ~i := #in~i; 362#L12 assume !(~i <= 0); 350#L14 call #t~ret0 := rec1(~i - 2);< 339#rec1ENTRY [2022-07-22 01:24:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:39,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1665524430, now seen corresponding path program 1 times [2022-07-22 01:24:39,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:39,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340753352] [2022-07-22 01:24:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:39,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:39,223 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:39,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2022-07-22 01:24:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:39,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596011743] [2022-07-22 01:24:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:39,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:39,236 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:24:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:24:39,238 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:24:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:39,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2118876407, now seen corresponding path program 1 times [2022-07-22 01:24:39,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:24:39,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607928139] [2022-07-22 01:24:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:24:39,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:24:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:39,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 01:24:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:39,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 01:24:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 01:24:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 01:24:39,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:24:39,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607928139] [2022-07-22 01:24:39,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607928139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 01:24:39,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 01:24:39,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 01:24:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228682117] [2022-07-22 01:24:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 01:24:39,329 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:24:39,329 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:24:39,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:24:39,330 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:24:39,330 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:24:39,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,330 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:24:39,330 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:24:39,330 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2022-07-22 01:24:39,330 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:24:39,331 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:24:39,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,366 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:24:39,366 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:24:39,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:39,378 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-22 01:24:39,404 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:39,404 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:39,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,437 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-22 01:24:39,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:39,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:39,464 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:39,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,489 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-22 01:24:39,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:39,497 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,520 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:39,520 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:39,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,546 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,554 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:39,554 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-07-22 01:24:39,575 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:39,575 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:39,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-07-22 01:24:39,596 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:39,596 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,607 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:24:39,607 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:24:39,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2022-07-22 01:24:39,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,627 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-07-22 01:24:39,628 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:24:39,628 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2022-07-22 01:24:39,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-07-22 01:24:39,654 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:24:39,654 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:24:39,737 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:24:39,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,747 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:24:39,747 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:24:39,747 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:24:39,747 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:24:39,747 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:24:39,747 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,747 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:24:39,747 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:24:39,747 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2022-07-22 01:24:39,747 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:24:39,747 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:24:39,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:24:39,807 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:24:39,807 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:24:39,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,809 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,816 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:39,823 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:39,823 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:39,823 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:39,823 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:39,823 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:39,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-22 01:24:39,828 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:39,828 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:39,829 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:24:39,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,848 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-07-22 01:24:39,850 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:39,856 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:39,856 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:39,856 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:39,856 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:39,856 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:39,856 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:39,856 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:39,857 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:24:39,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2022-07-22 01:24:39,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,873 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-07-22 01:24:39,876 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:39,882 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:39,882 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:39,882 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:39,882 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:39,882 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:39,883 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:39,883 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:39,899 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:24:39,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,924 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,927 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:39,934 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:39,934 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:39,934 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:39,934 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:39,934 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:39,935 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:39,935 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:39,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-07-22 01:24:39,951 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:24:39,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:39,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,971 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-07-22 01:24:39,973 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 01:24:39,978 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:24:39,978 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:24:39,978 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:24:39,978 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:24:39,978 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:24:39,979 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:24:39,979 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:24:39,987 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:24:39,988 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 01:24:39,988 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:24:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:24:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:24:39,990 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:24:39,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-07-22 01:24:39,991 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:24:39,991 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:24:39,991 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:24:39,992 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2022-07-22 01:24:40,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:40,008 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:24:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 01:24:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:24:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:24:40,266 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 [2022-07-22 01:24:40,266 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:24:40,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-07-22 01:24:40,341 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 32 states and 38 transitions. Complement of second has 7 states. [2022-07-22 01:24:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2022-07-22 01:24:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:24:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2022-07-22 01:24:40,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2022-07-22 01:24:40,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:40,344 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:24:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:40,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 01:24:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:24:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:24:40,586 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 [2022-07-22 01:24:40,586 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:24:40,634 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 32 states and 38 transitions. Complement of second has 7 states. [2022-07-22 01:24:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2022-07-22 01:24:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:24:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2022-07-22 01:24:40,636 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2022-07-22 01:24:40,636 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:40,636 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:24:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:24:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 01:24:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:24:40,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:24:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:24:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:24:40,856 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 [2022-07-22 01:24:40,856 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:24:40,940 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 54 states and 66 transitions. Complement of second has 13 states. [2022-07-22 01:24:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 01:24:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:24:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2022-07-22 01:24:40,941 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 22 letters. Loop has 3 letters. [2022-07-22 01:24:40,942 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:40,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 25 letters. Loop has 3 letters. [2022-07-22 01:24:40,942 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:40,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 22 letters. Loop has 6 letters. [2022-07-22 01:24:40,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:24:40,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 66 transitions. [2022-07-22 01:24:40,951 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:24:40,954 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 42 states and 53 transitions. [2022-07-22 01:24:40,954 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2022-07-22 01:24:40,954 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2022-07-22 01:24:40,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 53 transitions. [2022-07-22 01:24:40,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:24:40,955 INFO L369 hiAutomatonCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-07-22 01:24:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 53 transitions. [2022-07-22 01:24:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-07-22 01:24:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-22 01:24:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-07-22 01:24:40,959 INFO L392 hiAutomatonCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-07-22 01:24:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:24:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 01:24:40,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 01:24:40,960 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 01:24:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:24:41,003 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-22 01:24:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 01:24:41,004 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 30 transitions. [2022-07-22 01:24:41,007 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 01:24:41,007 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 0 states and 0 transitions. [2022-07-22 01:24:41,007 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-22 01:24:41,007 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-22 01:24:41,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-22 01:24:41,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 01:24:41,008 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:24:41,008 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:24:41,008 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:24:41,008 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-22 01:24:41,008 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-22 01:24:41,008 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 01:24:41,008 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-22 01:24:41,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 01:24:41 BoogieIcfgContainer [2022-07-22 01:24:41,018 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 01:24:41,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 01:24:41,018 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 01:24:41,018 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 01:24:41,019 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:24:37" (3/4) ... [2022-07-22 01:24:41,023 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 01:24:41,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 01:24:41,026 INFO L158 Benchmark]: Toolchain (without parser) took 4402.19ms. Allocated memory was 62.9MB in the beginning and 96.5MB in the end (delta: 33.6MB). Free memory was 43.8MB in the beginning and 53.9MB in the end (delta: -10.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-07-22 01:24:41,027 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory was 45.4MB in the beginning and 45.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:24:41,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.15ms. Allocated memory is still 62.9MB. Free memory was 43.6MB in the beginning and 35.0MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 01:24:41,028 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.33ms. Allocated memory is still 62.9MB. Free memory was 35.0MB in the beginning and 47.2MB in the end (delta: -12.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 01:24:41,028 INFO L158 Benchmark]: Boogie Preprocessor took 12.52ms. Allocated memory is still 62.9MB. Free memory was 47.2MB in the beginning and 46.4MB in the end (delta: 735.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:24:41,030 INFO L158 Benchmark]: RCFGBuilder took 255.17ms. Allocated memory is still 62.9MB. Free memory was 46.4MB in the beginning and 38.1MB in the end (delta: 8.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 01:24:41,031 INFO L158 Benchmark]: BuchiAutomizer took 3896.88ms. Allocated memory was 62.9MB in the beginning and 96.5MB in the end (delta: 33.6MB). Free memory was 38.1MB in the beginning and 54.9MB in the end (delta: -16.8MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. [2022-07-22 01:24:41,031 INFO L158 Benchmark]: Witness Printer took 4.55ms. Allocated memory is still 96.5MB. Free memory was 54.9MB in the beginning and 53.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 01:24:41,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 62.9MB. Free memory was 45.4MB in the beginning and 45.3MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.15ms. Allocated memory is still 62.9MB. Free memory was 43.6MB in the beginning and 35.0MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.33ms. Allocated memory is still 62.9MB. Free memory was 35.0MB in the beginning and 47.2MB in the end (delta: -12.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.52ms. Allocated memory is still 62.9MB. Free memory was 47.2MB in the beginning and 46.4MB in the end (delta: 735.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 255.17ms. Allocated memory is still 62.9MB. Free memory was 46.4MB in the beginning and 38.1MB in the end (delta: 8.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 3896.88ms. Allocated memory was 62.9MB in the beginning and 96.5MB in the end (delta: 33.6MB). Free memory was 38.1MB in the beginning and 54.9MB in the end (delta: -16.8MB). Peak memory consumption was 18.3MB. Max. memory is 16.1GB. * Witness Printer took 4.55ms. Allocated memory is still 96.5MB. Free memory was 54.9MB in the beginning and 53.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 3.8s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 2.2s. Construction of modules took 0.1s. Büchi inclusion checks took 1.3s. 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 -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 105 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 265 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 171 mSDsCounter, 48 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 147 IncrementalHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 48 mSolverCounterUnsat, 94 mSDtfsCounter, 147 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq148 hnf94 smp100 dnf100 smp100 tf111 neg94 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 90ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-22 01:24:41,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE