./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml', '-i', '../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(F end) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '64bit', '--witnessprinter.graph.data.programhash', '9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 23:46:14,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 23:46:14,319 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2024-11-07 23:46:14,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 23:46:14,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 23:46:14,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 23:46:14,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 23:46:14,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 23:46:14,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 23:46:14,363 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 23:46:14,364 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 23:46:14,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 23:46:14,364 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 23:46:14,364 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2024-11-07 23:46:14,364 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2024-11-07 23:46:14,365 INFO L153 SettingsManager]: * Use old map elimination=false [2024-11-07 23:46:14,365 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2024-11-07 23:46:14,365 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2024-11-07 23:46:14,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 23:46:14,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 23:46:14,366 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 23:46:14,367 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 23:46:14,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 23:46:14,367 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2024-11-07 23:46:14,367 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b [2024-11-07 23:46:14,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 23:46:14,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 23:46:14,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 23:46:14,638 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 23:46:14,638 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 23:46:14,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2024-11-07 23:46:15,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 23:46:16,248 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 23:46:16,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2024-11-07 23:46:16,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7d3eb7576/6a7885eeff1a432e913de03e96e200be/FLAG5fd43c228 [2024-11-07 23:46:16,575 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7d3eb7576/6a7885eeff1a432e913de03e96e200be [2024-11-07 23:46:16,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 23:46:16,579 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 23:46:16,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 23:46:16,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 23:46:16,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 23:46:16,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4efc3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16, skipping insertion in model container [2024-11-07 23:46:16,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,600 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 23:46:16,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 23:46:16,723 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 23:46:16,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 23:46:16,745 INFO L204 MainTranslator]: Completed translation [2024-11-07 23:46:16,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16 WrapperNode [2024-11-07 23:46:16,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 23:46:16,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 23:46:16,747 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 23:46:16,747 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 23:46:16,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,755 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,766 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 7 [2024-11-07 23:46:16,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 23:46:16,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 23:46:16,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 23:46:16,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 23:46:16,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,775 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,778 INFO L175 MemorySlicer]: No memory access in input program. [2024-11-07 23:46:16,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,779 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,782 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 23:46:16,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 23:46:16,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 23:46:16,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 23:46:16,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (1/1) ... [2024-11-07 23:46:16,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:16,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:16,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:16,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2024-11-07 23:46:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2024-11-07 23:46:16,839 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2024-11-07 23:46:16,839 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2024-11-07 23:46:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2024-11-07 23:46:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 23:46:16,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 23:46:16,879 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 23:46:16,880 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 23:46:16,958 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-07 23:46:16,958 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 23:46:16,966 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 23:46:16,966 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-07 23:46:16,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:46:16 BoogieIcfgContainer [2024-11-07 23:46:16,967 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 23:46:16,968 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2024-11-07 23:46:16,968 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2024-11-07 23:46:16,972 INFO L274 PluginConnector]: BuchiAutomizer initialized [2024-11-07 23:46:16,972 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-07 23:46:16,973 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.11 11:46:16" (1/3) ... [2024-11-07 23:46:16,974 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f92396f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.11 11:46:16, skipping insertion in model container [2024-11-07 23:46:16,974 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-07 23:46:16,974 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:46:16" (2/3) ... [2024-11-07 23:46:16,974 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f92396f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.11 11:46:16, skipping insertion in model container [2024-11-07 23:46:16,974 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2024-11-07 23:46:16,974 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:46:16" (3/3) ... [2024-11-07 23:46:16,975 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2024-11-07 23:46:17,022 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2024-11-07 23:46:17,022 INFO L301 stractBuchiCegarLoop]: Hoare is None [2024-11-07 23:46:17,023 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2024-11-07 23:46:17,023 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2024-11-07 23:46:17,024 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2024-11-07 23:46:17,024 INFO L305 stractBuchiCegarLoop]: Difference is false [2024-11-07 23:46:17,024 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2024-11-07 23:46:17,024 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2024-11-07 23:46:17,029 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) [2024-11-07 23:46:17,041 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:17,041 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:17,041 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:17,046 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-07 23:46:17,046 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:17,046 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2024-11-07 23:46:17,046 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) [2024-11-07 23:46:17,048 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:17,049 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:17,049 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:17,049 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-07 23:46:17,049 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:17,054 INFO L745 eck$LassoCheckResult]: Stem: 21#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 14#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;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 10#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 7#$Ultimate##0true [2024-11-07 23:46:17,054 INFO L747 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j);< 4#$Ultimate##0true ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#34#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 7#$Ultimate##0true [2024-11-07 23:46:17,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2024-11-07 23:46:17,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044400632] [2024-11-07 23:46:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:17,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2024-11-07 23:46:17,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:17,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512073023] [2024-11-07 23:46:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:17,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:17,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-07 23:46:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 23:46:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512073023] [2024-11-07 23:46:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512073023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 23:46:17,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 23:46:17,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 23:46:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711656228] [2024-11-07 23:46:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 23:46:17,284 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-07 23:46:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 23:46:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 23:46:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 23:46:17,312 INFO L87 Difference]: Start difference. 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 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-07 23:46:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 23:46:17,427 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2024-11-07 23:46:17,428 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 34 transitions. [2024-11-07 23:46:17,430 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:17,439 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2024-11-07 23:46:17,440 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2024-11-07 23:46:17,441 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2024-11-07 23:46:17,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2024-11-07 23:46:17,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-07 23:46:17,443 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2024-11-07 23:46:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2024-11-07 23:46:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-07 23:46:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-07 23:46:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2024-11-07 23:46:17,469 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2024-11-07 23:46:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 23:46:17,473 INFO L425 stractBuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2024-11-07 23:46:17,474 INFO L332 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2024-11-07 23:46:17,474 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2024-11-07 23:46:17,474 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:17,476 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:17,476 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:17,476 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2024-11-07 23:46:17,477 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:17,477 INFO L745 eck$LassoCheckResult]: Stem: 78#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 75#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;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 64#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 65#$Ultimate##0 [2024-11-07 23:46:17,477 INFO L747 eck$LassoCheckResult]: Loop: 65#$Ultimate##0 ~j := #in~j; 72#L18 assume !(~j <= 0); 70#L20 call #t~ret3 := rec1(~j);< 66#$Ultimate##0 ~i := #in~i; 71#L12 assume !(~i <= 0); 67#L14 call #t~ret0 := rec1(~i - 2);< 66#$Ultimate##0 ~i := #in~i; 71#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#28#return; 68#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 66#$Ultimate##0 ~i := #in~i; 71#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#30#return; 69#L14-2 call #t~ret2 := rec1(#t~ret1);< 66#$Ultimate##0 ~i := #in~i; 71#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#32#return; 73#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 74#rec1FINAL assume true; 79#rec1EXIT >#34#return; 63#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 65#$Ultimate##0 [2024-11-07 23:46:17,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 2 times [2024-11-07 23:46:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887301750] [2024-11-07 23:46:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:17,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -204878921, now seen corresponding path program 1 times [2024-11-07 23:46:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:17,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779951869] [2024-11-07 23:46:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:17,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash -482494696, now seen corresponding path program 1 times [2024-11-07 23:46:17,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551925691] [2024-11-07 23:46:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:17,590 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:18,000 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:18,001 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:18,001 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:18,001 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:18,001 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-07 23:46:18,001 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,001 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:18,001 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:18,002 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2024-11-07 23:46:18,002 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:18,002 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:18,012 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,017 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,019 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,022 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,030 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,065 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:18,065 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-07 23:46:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2024-11-07 23:46:18,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:18,072 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:18,093 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:18,094 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:18,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:18,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2024-11-07 23:46:18,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:18,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:18,135 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:18,135 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:18,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2024-11-07 23:46:18,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2024-11-07 23:46:18,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:18,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:18,161 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:18,161 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:18,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2024-11-07 23:46:18,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2024-11-07 23:46:18,174 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:18,174 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:18,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2024-11-07 23:46:18,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2024-11-07 23:46:18,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-07 23:46:18,205 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:18,218 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-07 23:46:18,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2024-11-07 23:46:18,229 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:18,229 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:18,229 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:18,229 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:18,229 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-07 23:46:18,229 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,229 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:18,229 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:18,229 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2024-11-07 23:46:18,229 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:18,229 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:18,230 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,233 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,236 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,238 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,246 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:18,278 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:18,281 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-07 23:46:18,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2024-11-07 23:46:18,288 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 [2024-11-07 23:46:18,301 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:18,301 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:18,302 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:18,302 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:18,302 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:18,305 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:18,305 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:18,307 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:18,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2024-11-07 23:46:18,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2024-11-07 23:46:18,327 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 [2024-11-07 23:46:18,340 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:18,340 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:18,340 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:18,340 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:18,340 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:18,341 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:18,341 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:18,343 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:18,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2024-11-07 23:46:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2024-11-07 23:46:18,356 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 [2024-11-07 23:46:18,367 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:18,367 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:18,367 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:18,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:18,367 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:18,367 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:18,367 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:18,369 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:18,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:18,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,382 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2024-11-07 23:46:18,384 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 [2024-11-07 23:46:18,393 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:18,394 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:18,394 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:18,394 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:18,394 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:18,395 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:18,395 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:18,397 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-07 23:46:18,400 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2024-11-07 23:46:18,403 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2024-11-07 23:46:18,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:18,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2024-11-07 23:46:18,407 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-07 23:46:18,407 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-07 23:46:18,407 INFO L474 LassoAnalysis]: Proved termination. [2024-11-07 23:46:18,408 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2024-11-07 23:46:18,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2024-11-07 23:46:18,420 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-07 23:46:18,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:18,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 23:46:18,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:18,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 23:46:18,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-07 23:46:18,763 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2024-11-07 23:46:18,765 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:18,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2024-11-07 23:46:19,135 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Result 102 states and 148 transitions. Complement of second has 42 states. [2024-11-07 23:46:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2024-11-07 23:46:19,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 24 letters. [2024-11-07 23:46:19,143 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:19,143 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 27 letters. Loop has 24 letters. [2024-11-07 23:46:19,144 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:19,144 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 48 letters. [2024-11-07 23:46:19,144 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:19,144 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 148 transitions. [2024-11-07 23:46:19,148 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:19,152 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 90 states and 136 transitions. [2024-11-07 23:46:19,152 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2024-11-07 23:46:19,153 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2024-11-07 23:46:19,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 136 transitions. [2024-11-07 23:46:19,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:19,154 INFO L218 hiAutomatonCegarLoop]: Abstraction has 90 states and 136 transitions. [2024-11-07 23:46:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states and 136 transitions. [2024-11-07 23:46:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2024-11-07 23:46:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2024-11-07 23:46:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2024-11-07 23:46:19,164 INFO L240 hiAutomatonCegarLoop]: Abstraction has 63 states and 99 transitions. [2024-11-07 23:46:19,164 INFO L425 stractBuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2024-11-07 23:46:19,164 INFO L332 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2024-11-07 23:46:19,164 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 99 transitions. [2024-11-07 23:46:19,166 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:19,166 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:19,166 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:19,166 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:19,166 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-07 23:46:19,167 INFO L745 eck$LassoCheckResult]: Stem: 383#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 376#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;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 344#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 353#$Ultimate##0 ~j := #in~j; 355#L18 assume !(~j <= 0); 348#L20 call #t~ret3 := rec1(~j);< 347#$Ultimate##0 ~i := #in~i; 349#L12 assume !(~i <= 0); 360#L14 call #t~ret0 := rec1(~i - 2);< 374#$Ultimate##0 [2024-11-07 23:46:19,167 INFO L747 eck$LassoCheckResult]: Loop: 374#$Ultimate##0 ~i := #in~i; 393#L12 assume !(~i <= 0); 357#L14 call #t~ret0 := rec1(~i - 2);< 374#$Ultimate##0 [2024-11-07 23:46:19,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2024-11-07 23:46:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:19,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737322134] [2024-11-07 23:46:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:19,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2024-11-07 23:46:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:19,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156087495] [2024-11-07 23:46:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:19,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2024-11-07 23:46:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672442848] [2024-11-07 23:46:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:19,227 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:19,227 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:19,227 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:19,227 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:19,227 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-07 23:46:19,227 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,227 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:19,227 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:19,227 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2024-11-07 23:46:19,228 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:19,228 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:19,228 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,231 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,233 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,236 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,238 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,244 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,275 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:19,275 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-07 23:46:19,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2024-11-07 23:46:19,280 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:19,281 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:19,295 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:19,295 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:19,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2024-11-07 23:46:19,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,312 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2024-11-07 23:46:19,315 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:19,315 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:19,329 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:19,329 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:19,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2024-11-07 23:46:19,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,347 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2024-11-07 23:46:19,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:19,351 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:19,363 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:19,363 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:19,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2024-11-07 23:46:19,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,376 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2024-11-07 23:46:19,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:19,378 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:19,389 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:19,389 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:19,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2024-11-07 23:46:19,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2024-11-07 23:46:19,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:19,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:19,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2024-11-07 23:46:19,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,426 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2024-11-07 23:46:19,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-07 23:46:19,428 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:19,470 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-07 23:46:19,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2024-11-07 23:46:19,474 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:19,474 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:19,474 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:19,474 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:19,474 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-07 23:46:19,474 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,474 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:19,474 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:19,474 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2024-11-07 23:46:19,474 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:19,474 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:19,475 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,477 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,479 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,484 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,486 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,492 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:19,521 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:19,522 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-07 23:46:19,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,524 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2024-11-07 23:46:19,527 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 [2024-11-07 23:46:19,539 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:19,539 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:19,539 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:19,539 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:19,539 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:19,540 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:19,540 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:19,541 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:19,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2024-11-07 23:46:19,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,558 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2024-11-07 23:46:19,561 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 [2024-11-07 23:46:19,574 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:19,574 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:19,574 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:19,574 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:19,574 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:19,575 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:19,575 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:19,576 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:19,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:19,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2024-11-07 23:46:19,596 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 [2024-11-07 23:46:19,609 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:19,609 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:19,609 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:19,609 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:19,609 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:19,610 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:19,610 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:19,611 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:19,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2024-11-07 23:46:19,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,625 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2024-11-07 23:46:19,626 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 [2024-11-07 23:46:19,636 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:19,636 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:19,636 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:19,636 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:19,636 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:19,637 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:19,637 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:19,638 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:19,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2024-11-07 23:46:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2024-11-07 23:46:19,654 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 [2024-11-07 23:46:19,664 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:19,664 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:19,664 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:19,664 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:19,664 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:19,665 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:19,665 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:19,668 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-07 23:46:19,673 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-07 23:46:19,673 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-07 23:46:19,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:19,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:19,676 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:19,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2024-11-07 23:46:19,681 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-07 23:46:19,681 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-07 23:46:19,681 INFO L474 LassoAnalysis]: Proved termination. [2024-11-07 23:46:19,681 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2024-11-07 23:46:19,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2024-11-07 23:46:19,693 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-07 23:46:19,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:19,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 23:46:19,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:19,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:19,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:19,784 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2024-11-07 23:46:19,785 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 23:46:19,840 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 109 states and 166 transitions. Complement of second has 17 states. [2024-11-07 23:46:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 23:46:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2024-11-07 23:46:19,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 9 letters. Loop has 3 letters. [2024-11-07 23:46:19,842 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:19,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 12 letters. Loop has 3 letters. [2024-11-07 23:46:19,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:19,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 9 letters. Loop has 6 letters. [2024-11-07 23:46:19,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:19,843 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 166 transitions. [2024-11-07 23:46:19,846 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:19,853 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 97 states and 154 transitions. [2024-11-07 23:46:19,854 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2024-11-07 23:46:19,854 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2024-11-07 23:46:19,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 154 transitions. [2024-11-07 23:46:19,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:19,855 INFO L218 hiAutomatonCegarLoop]: Abstraction has 97 states and 154 transitions. [2024-11-07 23:46:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 154 transitions. [2024-11-07 23:46:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2024-11-07 23:46:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 60 states have internal predecessors, (62), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (56), 18 states have call predecessors, (56), 22 states have call successors, (56) [2024-11-07 23:46:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2024-11-07 23:46:19,864 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 144 transitions. [2024-11-07 23:46:19,864 INFO L425 stractBuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2024-11-07 23:46:19,864 INFO L332 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2024-11-07 23:46:19,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 144 transitions. [2024-11-07 23:46:19,866 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:19,866 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:19,866 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:19,866 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:19,866 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-07 23:46:19,867 INFO L745 eck$LassoCheckResult]: Stem: 636#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 626#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;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 587#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 605#$Ultimate##0 ~j := #in~j; 607#L18 assume !(~j <= 0); 631#L20 call #t~ret3 := rec1(~j);< 635#$Ultimate##0 ~i := #in~i; 653#L12 assume !(~i <= 0); 610#L14 call #t~ret0 := rec1(~i - 2);< 651#$Ultimate##0 ~i := #in~i; 656#L12 assume ~i <= 0;#res := 0; 655#rec1FINAL assume true; 650#rec1EXIT >#28#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 592#$Ultimate##0 [2024-11-07 23:46:19,867 INFO L747 eck$LassoCheckResult]: Loop: 592#$Ultimate##0 ~i := #in~i; 600#L12 assume !(~i <= 0); 596#L14 call #t~ret0 := rec1(~i - 2);< 592#$Ultimate##0 [2024-11-07 23:46:19,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2024-11-07 23:46:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859837303] [2024-11-07 23:46:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:19,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2024-11-07 23:46:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953746645] [2024-11-07 23:46:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:19,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:19,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2024-11-07 23:46:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:19,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461959026] [2024-11-07 23:46:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:19,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:19,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-07 23:46:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 23:46:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 23:46:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461959026] [2024-11-07 23:46:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461959026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 23:46:19,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 23:46:19,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 23:46:19,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595262067] [2024-11-07 23:46:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 23:46:19,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:20,031 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:20,031 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:20,031 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:20,031 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:20,031 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-07 23:46:20,031 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,031 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:20,031 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:20,031 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2024-11-07 23:46:20,031 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:20,031 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:20,032 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,035 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,041 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,043 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,045 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,047 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,071 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:20,071 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-07 23:46:20,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,073 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2024-11-07 23:46:20,074 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:20,075 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:20,085 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:20,085 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:20,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2024-11-07 23:46:20,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,098 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2024-11-07 23:46:20,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:20,101 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:20,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:20,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,123 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2024-11-07 23:46:20,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-07 23:46:20,125 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:20,173 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-07 23:46:20,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2024-11-07 23:46:20,177 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:20,178 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:20,178 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:20,178 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:20,178 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-07 23:46:20,178 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,178 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:20,178 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:20,178 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2024-11-07 23:46:20,178 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:20,178 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:20,179 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,181 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,189 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,190 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,192 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,193 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:20,216 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:20,216 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-07 23:46:20,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,219 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2024-11-07 23:46:20,220 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 [2024-11-07 23:46:20,230 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:20,230 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:20,230 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:20,230 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:20,230 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:20,231 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:20,231 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:20,232 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:20,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2024-11-07 23:46:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,245 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2024-11-07 23:46:20,247 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 [2024-11-07 23:46:20,260 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:20,260 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:20,260 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:20,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:20,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:20,262 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:20,262 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:20,264 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-07 23:46:20,265 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-07 23:46:20,265 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-07 23:46:20,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:20,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,267 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2024-11-07 23:46:20,269 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-07 23:46:20,269 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-07 23:46:20,269 INFO L474 LassoAnalysis]: Proved termination. [2024-11-07 23:46:20,269 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2024-11-07 23:46:20,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2024-11-07 23:46:20,279 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-07 23:46:20,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 23:46:20,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:20,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:20,424 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-07 23:46:20,424 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-07 23:46:20,510 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 133 states and 208 transitions. Complement of second has 18 states. [2024-11-07 23:46:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-07 23:46:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2024-11-07 23:46:20,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 14 letters. Loop has 3 letters. [2024-11-07 23:46:20,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:20,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 17 letters. Loop has 3 letters. [2024-11-07 23:46:20,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:20,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 14 letters. Loop has 6 letters. [2024-11-07 23:46:20,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:20,514 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 208 transitions. [2024-11-07 23:46:20,518 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:20,526 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 121 states and 196 transitions. [2024-11-07 23:46:20,526 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2024-11-07 23:46:20,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2024-11-07 23:46:20,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 196 transitions. [2024-11-07 23:46:20,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:20,527 INFO L218 hiAutomatonCegarLoop]: Abstraction has 121 states and 196 transitions. [2024-11-07 23:46:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 196 transitions. [2024-11-07 23:46:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2024-11-07 23:46:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 76 states have internal predecessors, (80), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (74), 22 states have call predecessors, (74), 28 states have call successors, (74) [2024-11-07 23:46:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 186 transitions. [2024-11-07 23:46:20,546 INFO L240 hiAutomatonCegarLoop]: Abstraction has 117 states and 186 transitions. [2024-11-07 23:46:20,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 23:46:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 23:46:20,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-07 23:46:20,547 INFO L87 Difference]: Start difference. First operand 117 states and 186 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-07 23:46:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 23:46:20,593 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2024-11-07 23:46:20,593 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 130 states and 196 transitions. [2024-11-07 23:46:20,599 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2024-11-07 23:46:20,601 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 130 states to 128 states and 194 transitions. [2024-11-07 23:46:20,602 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 60 [2024-11-07 23:46:20,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2024-11-07 23:46:20,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 194 transitions. [2024-11-07 23:46:20,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:20,602 INFO L218 hiAutomatonCegarLoop]: Abstraction has 128 states and 194 transitions. [2024-11-07 23:46:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 194 transitions. [2024-11-07 23:46:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2024-11-07 23:46:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (60), 22 states have call predecessors, (60), 26 states have call successors, (60) [2024-11-07 23:46:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2024-11-07 23:46:20,610 INFO L240 hiAutomatonCegarLoop]: Abstraction has 105 states and 158 transitions. [2024-11-07 23:46:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 23:46:20,611 INFO L425 stractBuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2024-11-07 23:46:20,611 INFO L332 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2024-11-07 23:46:20,611 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 158 transitions. [2024-11-07 23:46:20,612 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2024-11-07 23:46:20,613 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:20,613 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:20,613 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:20,613 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:20,613 INFO L745 eck$LassoCheckResult]: Stem: 1218#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1207#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1165#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1200#$Ultimate##0 ~j := #in~j; 1231#L18 assume !(~j <= 0); 1201#L20 call #t~ret3 := rec1(~j);< 1230#$Ultimate##0 ~i := #in~i; 1229#L12 assume !(~i <= 0); 1183#L14 call #t~ret0 := rec1(~i - 2);< 1227#$Ultimate##0 ~i := #in~i; 1226#L12 assume !(~i <= 0); 1187#L14 call #t~ret0 := rec1(~i - 2);< 1225#$Ultimate##0 ~i := #in~i; 1228#L12 assume ~i <= 0;#res := 0; 1208#rec1FINAL assume true; 1209#rec1EXIT >#28#return; 1171#L14-1 [2024-11-07 23:46:20,613 INFO L747 eck$LassoCheckResult]: Loop: 1171#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1169#$Ultimate##0 ~i := #in~i; 1172#L12 assume ~i <= 0;#res := 0; 1266#rec1FINAL assume true; 1254#rec1EXIT >#30#return; 1179#L14-2 call #t~ret2 := rec1(#t~ret1);< 1203#$Ultimate##0 ~i := #in~i; 1245#L12 assume !(~i <= 0); 1181#L14 call #t~ret0 := rec1(~i - 2);< 1203#$Ultimate##0 ~i := #in~i; 1245#L12 assume ~i <= 0;#res := 0; 1244#rec1FINAL assume true; 1243#rec1EXIT >#28#return; 1171#L14-1 [2024-11-07 23:46:20,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2024-11-07 23:46:20,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:20,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318724917] [2024-11-07 23:46:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:20,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:20,620 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:20,628 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:20,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2024-11-07 23:46:20,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:20,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771331668] [2024-11-07 23:46:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-11-07 23:46:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-07 23:46:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 23:46:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 23:46:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771331668] [2024-11-07 23:46:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771331668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 23:46:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918860494] [2024-11-07 23:46:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:20,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 23:46:20,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,691 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-07 23:46:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 23:46:20,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:20,740 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 23:46:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918860494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 23:46:20,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 23:46:20,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2024-11-07 23:46:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503218825] [2024-11-07 23:46:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 23:46:20,740 INFO L762 eck$LassoCheckResult]: loop already infeasible [2024-11-07 23:46:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 23:46:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 23:46:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-07 23:46:20,742 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. cyclomatic complexity: 59 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-07 23:46:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 23:46:20,778 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2024-11-07 23:46:20,778 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 120 states and 174 transitions. [2024-11-07 23:46:20,780 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:20,783 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 120 states to 115 states and 165 transitions. [2024-11-07 23:46:20,783 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2024-11-07 23:46:20,783 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2024-11-07 23:46:20,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 165 transitions. [2024-11-07 23:46:20,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:20,783 INFO L218 hiAutomatonCegarLoop]: Abstraction has 115 states and 165 transitions. [2024-11-07 23:46:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states and 165 transitions. [2024-11-07 23:46:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-11-07 23:46:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.109375) internal successors, (71), 69 states have internal predecessors, (71), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2024-11-07 23:46:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2024-11-07 23:46:20,801 INFO L240 hiAutomatonCegarLoop]: Abstraction has 112 states and 162 transitions. [2024-11-07 23:46:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 23:46:20,802 INFO L425 stractBuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2024-11-07 23:46:20,802 INFO L332 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2024-11-07 23:46:20,802 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 162 transitions. [2024-11-07 23:46:20,803 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2024-11-07 23:46:20,803 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:20,803 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:20,804 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:20,804 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-07 23:46:20,804 INFO L745 eck$LassoCheckResult]: Stem: 1505#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1491#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;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1447#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1475#$Ultimate##0 ~j := #in~j; 1516#L18 assume !(~j <= 0); 1461#L20 call #t~ret3 := rec1(~j);< 1515#$Ultimate##0 ~i := #in~i; 1514#L12 assume !(~i <= 0); 1478#L14 call #t~ret0 := rec1(~i - 2);< 1513#$Ultimate##0 ~i := #in~i; 1511#L12 assume !(~i <= 0); 1484#L14 call #t~ret0 := rec1(~i - 2);< 1510#$Ultimate##0 ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1492#rec1FINAL assume true; 1493#rec1EXIT >#28#return; 1487#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1488#$Ultimate##0 ~i := #in~i; 1524#L12 assume ~i <= 0;#res := 0; 1523#rec1FINAL assume true; 1521#rec1EXIT >#30#return; 1452#L14-2 call #t~ret2 := rec1(#t~ret1);< 1451#$Ultimate##0 ~i := #in~i; 1453#L12 assume ~i <= 0;#res := 0; 1500#rec1FINAL assume true; 1496#rec1EXIT >#32#return; 1497#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1526#rec1FINAL assume true; 1525#rec1EXIT >#28#return; 1480#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1502#$Ultimate##0 [2024-11-07 23:46:20,804 INFO L747 eck$LassoCheckResult]: Loop: 1502#$Ultimate##0 ~i := #in~i; 1528#L12 assume !(~i <= 0); 1481#L14 call #t~ret0 := rec1(~i - 2);< 1502#$Ultimate##0 [2024-11-07 23:46:20,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2024-11-07 23:46:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:20,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015486837] [2024-11-07 23:46:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:20,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:20,816 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:20,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:20,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2024-11-07 23:46:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219717623] [2024-11-07 23:46:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:20,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:20,837 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:20,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1475637376, now seen corresponding path program 2 times [2024-11-07 23:46:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166098654] [2024-11-07 23:46:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-07 23:46:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-07 23:46:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-07 23:46:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-07 23:46:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-07 23:46:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 23:46:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166098654] [2024-11-07 23:46:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166098654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 23:46:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810966583] [2024-11-07 23:46:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 23:46:20,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 23:46:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:20,968 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 23:46:20,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-07 23:46:21,010 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 23:46:21,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 23:46:21,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:21,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-07 23:46:21,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 23:46:21,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2024-11-07 23:46:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-07 23:46:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810966583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 23:46:21,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 23:46:21,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-11-07 23:46:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153034297] [2024-11-07 23:46:21,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 23:46:21,196 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:21,196 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:21,196 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:21,196 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:21,196 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-07 23:46:21,196 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,196 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:21,196 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:21,196 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2024-11-07 23:46:21,196 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:21,196 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:21,197 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,201 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,203 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,205 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,207 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,208 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,234 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:21,235 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-07 23:46:21,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,237 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2024-11-07 23:46:21,239 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:21,239 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,250 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:21,250 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:21,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2024-11-07 23:46:21,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,263 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2024-11-07 23:46:21,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:21,264 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,274 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:21,275 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:21,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2024-11-07 23:46:21,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,287 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2024-11-07 23:46:21,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:21,289 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,300 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:21,300 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:21,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2024-11-07 23:46:21,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,313 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2024-11-07 23:46:21,314 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:21,314 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,326 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:21,326 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:21,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2024-11-07 23:46:21,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,339 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2024-11-07 23:46:21,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:21,342 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,354 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:21,354 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:21,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2024-11-07 23:46:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,367 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2024-11-07 23:46:21,368 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:21,368 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2024-11-07 23:46:21,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,392 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2024-11-07 23:46:21,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-07 23:46:21,394 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:21,439 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-07 23:46:21,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2024-11-07 23:46:21,444 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:21,444 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:21,444 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:21,444 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:21,444 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-07 23:46:21,444 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,444 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:21,444 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:21,444 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2024-11-07 23:46:21,444 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:21,444 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:21,445 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,450 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,454 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,456 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,458 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,460 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:21,489 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:21,489 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-07 23:46:21,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,493 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2024-11-07 23:46:21,495 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 [2024-11-07 23:46:21,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:21,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:21,508 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:21,508 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:21,508 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:21,508 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:21,508 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:21,510 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:21,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2024-11-07 23:46:21,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,523 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2024-11-07 23:46:21,526 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 [2024-11-07 23:46:21,535 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:21,535 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:21,536 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:21,536 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:21,536 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:21,536 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:21,536 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:21,537 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:21,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:21,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,550 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2024-11-07 23:46:21,551 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 [2024-11-07 23:46:21,561 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:21,561 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:21,561 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:21,561 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:21,561 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:21,561 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:21,562 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:21,563 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:21,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2024-11-07 23:46:21,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,575 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2024-11-07 23:46:21,577 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 [2024-11-07 23:46:21,587 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:21,587 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:21,587 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:21,587 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:21,587 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:21,587 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:21,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:21,589 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:21,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2024-11-07 23:46:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,601 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2024-11-07 23:46:21,602 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 [2024-11-07 23:46:21,611 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:21,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:21,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:21,612 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:21,612 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:21,612 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:21,612 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:21,613 INFO L488 LassoAnalysis]: Proving termination failed for this template and these settings. [2024-11-07 23:46:21,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2024-11-07 23:46:21,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,625 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2024-11-07 23:46:21,626 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 [2024-11-07 23:46:21,636 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:21,636 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:21,636 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:21,636 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:21,636 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:21,637 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:21,637 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:21,639 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-07 23:46:21,641 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-07 23:46:21,641 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-07 23:46:21,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:21,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:21,646 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:21,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2024-11-07 23:46:21,647 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-07 23:46:21,648 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-07 23:46:21,648 INFO L474 LassoAnalysis]: Proved termination. [2024-11-07 23:46:21,648 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2024-11-07 23:46:21,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2024-11-07 23:46:21,663 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-07 23:46:21,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:21,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 23:46:21,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:21,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:21,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:21,973 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-07 23:46:21,974 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:22,036 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 9 states. [2024-11-07 23:46:22,037 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 [2024-11-07 23:46:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2024-11-07 23:46:22,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2024-11-07 23:46:22,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:22,038 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-07 23:46:22,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 23:46:22,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:22,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:22,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:22,359 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-07 23:46:22,359 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:22,409 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 9 states. [2024-11-07 23:46:22,412 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 [2024-11-07 23:46:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2024-11-07 23:46:22,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2024-11-07 23:46:22,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:22,413 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-07 23:46:22,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 23:46:22,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:22,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:22,690 INFO L141 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 [2024-11-07 23:46:22,690 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:22,773 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 157 states and 219 transitions. Complement of second has 17 states. [2024-11-07 23:46:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 25 transitions. [2024-11-07 23:46:22,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2024-11-07 23:46:22,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:22,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2024-11-07 23:46:22,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:22,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2024-11-07 23:46:22,775 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:22,775 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 219 transitions. [2024-11-07 23:46:22,777 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2024-11-07 23:46:22,779 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 139 states and 201 transitions. [2024-11-07 23:46:22,779 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2024-11-07 23:46:22,780 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 58 [2024-11-07 23:46:22,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 201 transitions. [2024-11-07 23:46:22,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:22,780 INFO L218 hiAutomatonCegarLoop]: Abstraction has 139 states and 201 transitions. [2024-11-07 23:46:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 201 transitions. [2024-11-07 23:46:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2024-11-07 23:46:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 75 states have internal predecessors, (79), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2024-11-07 23:46:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2024-11-07 23:46:22,788 INFO L240 hiAutomatonCegarLoop]: Abstraction has 120 states and 170 transitions. [2024-11-07 23:46:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 23:46:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 23:46:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-07 23:46:22,788 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-07 23:46:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 23:46:22,833 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2024-11-07 23:46:22,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98 states and 116 transitions. [2024-11-07 23:46:22,834 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-11-07 23:46:22,838 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98 states to 63 states and 75 transitions. [2024-11-07 23:46:22,838 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2024-11-07 23:46:22,838 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2024-11-07 23:46:22,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 75 transitions. [2024-11-07 23:46:22,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2024-11-07 23:46:22,838 INFO L218 hiAutomatonCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-07 23:46:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 75 transitions. [2024-11-07 23:46:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-11-07 23:46:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-07 23:46:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-07 23:46:22,841 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-07 23:46:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 23:46:22,846 INFO L425 stractBuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-07 23:46:22,846 INFO L332 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2024-11-07 23:46:22,846 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 65 transitions. [2024-11-07 23:46:22,846 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2024-11-07 23:46:22,846 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2024-11-07 23:46:22,846 INFO L119 BuchiIsEmpty]: Starting construction of run [2024-11-07 23:46:22,847 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 23:46:22,847 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2024-11-07 23:46:22,847 INFO L745 eck$LassoCheckResult]: Stem: 2824#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2818#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;havoc main_#t~nondet5#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 2794#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 2803#$Ultimate##0 ~j := #in~j; 2804#L18 assume !(~j <= 0); 2816#L20 call #t~ret3 := rec1(~j);< 2842#$Ultimate##0 ~i := #in~i; 2839#L12 assume !(~i <= 0); 2811#L14 call #t~ret0 := rec1(~i - 2);< 2841#$Ultimate##0 ~i := #in~i; 2846#L12 assume ~i <= 0;#res := 0; 2845#rec1FINAL assume true; 2820#rec1EXIT >#28#return; 2815#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2817#$Ultimate##0 ~i := #in~i; 2838#L12 assume ~i <= 0;#res := 0; 2837#rec1FINAL assume true; 2831#rec1EXIT >#30#return; 2829#L14-2 call #t~ret2 := rec1(#t~ret1);< 2814#$Ultimate##0 ~i := #in~i; 2833#L12 assume ~i <= 0;#res := 0; 2830#rec1FINAL assume true; 2828#rec1EXIT >#32#return; 2827#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 2826#rec1FINAL assume true; 2825#rec1EXIT >#34#return; 2793#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2795#$Ultimate##0 ~j := #in~j; 2805#L18 assume !(~j <= 0); 2799#L20 call #t~ret3 := rec1(~j);< 2796#$Ultimate##0 [2024-11-07 23:46:22,847 INFO L747 eck$LassoCheckResult]: Loop: 2796#$Ultimate##0 ~i := #in~i; 2798#L12 assume !(~i <= 0); 2797#L14 call #t~ret0 := rec1(~i - 2);< 2796#$Ultimate##0 [2024-11-07 23:46:22,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1256061253, now seen corresponding path program 2 times [2024-11-07 23:46:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:22,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286621952] [2024-11-07 23:46:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-07 23:46:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-07 23:46:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-07 23:46:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-07 23:46:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-07 23:46:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 23:46:22,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286621952] [2024-11-07 23:46:22,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286621952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 23:46:22,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647536152] [2024-11-07 23:46:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 23:46:22,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 23:46:22,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:22,949 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 23:46:22,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-07 23:46:22,999 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 23:46:22,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 23:46:23,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:23,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-07 23:46:23,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 23:46:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-07 23:46:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647536152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 23:46:23,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 23:46:23,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-11-07 23:46:23,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635313662] [2024-11-07 23:46:23,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 23:46:23,115 INFO L750 eck$LassoCheckResult]: stem already infeasible [2024-11-07 23:46:23,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 4 times [2024-11-07 23:46:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 23:46:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174739575] [2024-11-07 23:46:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 23:46:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 23:46:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:23,122 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 23:46:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 23:46:23,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 23:46:23,152 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:23,152 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:23,152 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:23,152 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:23,152 INFO L128 ssoRankerPreferences]: Use exernal solver: true [2024-11-07 23:46:23,152 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,152 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:23,152 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:23,152 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2024-11-07 23:46:23,153 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:23,153 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:23,153 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,155 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,160 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,161 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,165 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,167 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,195 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:23,195 INFO L365 LassoAnalysis]: Checking for nontermination... [2024-11-07 23:46:23,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:23,198 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:23,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2024-11-07 23:46:23,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:23,199 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:23,210 INFO L398 LassoAnalysis]: Proved nontermination for one component. [2024-11-07 23:46:23,211 INFO L401 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2024-11-07 23:46:23,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2024-11-07 23:46:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:23,223 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2024-11-07 23:46:23,224 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2024-11-07 23:46:23,224 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:23,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Ended with exit code 0 [2024-11-07 23:46:23,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:23,246 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:23,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2024-11-07 23:46:23,248 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2024-11-07 23:46:23,248 INFO L160 nArgumentSynthesizer]: Using integer mode. [2024-11-07 23:46:23,289 INFO L405 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2024-11-07 23:46:23,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2024-11-07 23:46:23,293 INFO L204 LassoAnalysis]: Preferences: [2024-11-07 23:46:23,293 INFO L125 ssoRankerPreferences]: Compute integeral hull: false [2024-11-07 23:46:23,294 INFO L126 ssoRankerPreferences]: Enable LassoPartitioneer: true [2024-11-07 23:46:23,294 INFO L127 ssoRankerPreferences]: Term annotations enabled: false [2024-11-07 23:46:23,294 INFO L128 ssoRankerPreferences]: Use exernal solver: false [2024-11-07 23:46:23,294 INFO L129 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,294 INFO L130 ssoRankerPreferences]: Dump SMT script to file: false [2024-11-07 23:46:23,294 INFO L131 ssoRankerPreferences]: Path of dumped script: [2024-11-07 23:46:23,294 INFO L132 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2024-11-07 23:46:23,294 INFO L133 ssoRankerPreferences]: MapElimAlgo: Frank [2024-11-07 23:46:23,294 INFO L241 LassoAnalysis]: Starting lasso preprocessing... [2024-11-07 23:46:23,294 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,298 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,300 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,302 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,304 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,305 INFO L118 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2024-11-07 23:46:23,326 INFO L259 LassoAnalysis]: Preprocessing complete. [2024-11-07 23:46:23,326 INFO L451 LassoAnalysis]: Using template 'affine'. [2024-11-07 23:46:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:23,329 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:23,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2024-11-07 23:46:23,332 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 [2024-11-07 23:46:23,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2024-11-07 23:46:23,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2024-11-07 23:46:23,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2024-11-07 23:46:23,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2024-11-07 23:46:23,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2024-11-07 23:46:23,344 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2024-11-07 23:46:23,344 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2024-11-07 23:46:23,345 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2024-11-07 23:46:23,347 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2024-11-07 23:46:23,347 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2024-11-07 23:46:23,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2024-11-07 23:46:23,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 23:46:23,349 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2024-11-07 23:46:23,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2024-11-07 23:46:23,350 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2024-11-07 23:46:23,350 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2024-11-07 23:46:23,350 INFO L474 LassoAnalysis]: Proved termination. [2024-11-07 23:46:23,350 INFO L476 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2024-11-07 23:46:23,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2024-11-07 23:46:23,361 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2024-11-07 23:46:23,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:23,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 23:46:23,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:23,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:23,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:23,619 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-07 23:46:23,619 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:23,669 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 15 states. [2024-11-07 23:46:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2024-11-07 23:46:23,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2024-11-07 23:46:23,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:23,671 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-07 23:46:23,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:23,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 23:46:23,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:23,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2024-11-07 23:46:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:23,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:23,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:23,928 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2024-11-07 23:46:23,928 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:23,984 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 15 states. [2024-11-07 23:46:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2024-11-07 23:46:23,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2024-11-07 23:46:23,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:23,986 INFO L682 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2024-11-07 23:46:23,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 23:46:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:24,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 23:46:24,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 23:46:24,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-07 23:46:24,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 23:46:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 23:46:24,227 INFO L141 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 [2024-11-07 23:46:24,228 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:24,302 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 78 states and 90 transitions. Complement of second has 15 states. [2024-11-07 23:46:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2024-11-07 23:46:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-07 23:46:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 25 transitions. [2024-11-07 23:46:24,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2024-11-07 23:46:24,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:24,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2024-11-07 23:46:24,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:24,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2024-11-07 23:46:24,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2024-11-07 23:46:24,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 90 transitions. [2024-11-07 23:46:24,305 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-07 23:46:24,305 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 0 states and 0 transitions. [2024-11-07 23:46:24,305 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-07 23:46:24,305 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-07 23:46:24,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-07 23:46:24,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-07 23:46:24,305 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-07 23:46:24,305 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-07 23:46:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 23:46:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 23:46:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-07 23:46:24,305 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-07 23:46:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 23:46:24,305 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-07 23:46:24,306 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2024-11-07 23:46:24,306 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2024-11-07 23:46:24,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2024-11-07 23:46:24,306 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 23:46:24,306 INFO L425 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L332 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2024-11-07 23:46:24,306 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2024-11-07 23:46:24,306 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2024-11-07 23:46:24,306 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2024-11-07 23:46:24,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.11 11:46:24 BoogieIcfgContainer [2024-11-07 23:46:24,315 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2024-11-07 23:46:24,315 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-07 23:46:24,315 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-07 23:46:24,316 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-07 23:46:24,316 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:46:16" (3/4) ... [2024-11-07 23:46:24,318 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-07 23:46:24,319 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-07 23:46:24,319 INFO L158 Benchmark]: Toolchain (without parser) took 7740.70ms. Allocated memory was 117.4MB in the beginning and 151.0MB in the end (delta: 33.6MB). Free memory was 91.4MB in the beginning and 65.1MB in the end (delta: 26.3MB). Peak memory consumption was 58.0MB. Max. memory is 16.1GB. [2024-11-07 23:46:24,321 INFO L158 Benchmark]: CDTParser took 0.62ms. Allocated memory is still 117.4MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 23:46:24,321 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.71ms. Allocated memory is still 117.4MB. Free memory was 91.2MB in the beginning and 81.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-07 23:46:24,321 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.70ms. Allocated memory is still 117.4MB. Free memory was 81.5MB in the beginning and 80.6MB in the end (delta: 994.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 23:46:24,321 INFO L158 Benchmark]: Boogie Preprocessor took 15.07ms. Allocated memory is still 117.4MB. Free memory was 80.6MB in the beginning and 79.7MB in the end (delta: 900.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 23:46:24,321 INFO L158 Benchmark]: RCFGBuilder took 183.81ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 70.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-07 23:46:24,322 INFO L158 Benchmark]: BuchiAutomizer took 7347.30ms. Allocated memory was 117.4MB in the beginning and 151.0MB in the end (delta: 33.6MB). Free memory was 70.1MB in the beginning and 65.2MB in the end (delta: 5.0MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. [2024-11-07 23:46:24,322 INFO L158 Benchmark]: Witness Printer took 3.31ms. Allocated memory is still 151.0MB. Free memory was 65.2MB in the beginning and 65.1MB in the end (delta: 51.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 23:46:24,324 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62ms. Allocated memory is still 117.4MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.71ms. Allocated memory is still 117.4MB. Free memory was 91.2MB in the beginning and 81.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.70ms. Allocated memory is still 117.4MB. Free memory was 81.5MB in the beginning and 80.6MB in the end (delta: 994.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.07ms. Allocated memory is still 117.4MB. Free memory was 80.6MB in the beginning and 79.7MB in the end (delta: 900.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 183.81ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 70.3MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 7347.30ms. Allocated memory was 117.4MB in the beginning and 151.0MB in the end (delta: 33.6MB). Free memory was 70.1MB in the beginning and 65.2MB in the end (delta: 5.0MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. * Witness Printer took 3.31ms. Allocated memory is still 151.0MB. Free memory was 65.2MB in the beginning and 65.1MB in the end (delta: 51.9kB). There was no memory consumed. 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 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function \old(i) and consists of 6 locations. One nondeterministic module has affine ranking function \old(i) and consists of 6 locations. One nondeterministic module has affine ranking function \old(i) and consists of 6 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.2s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 3.6s. Construction of modules took 0.4s. Büchi inclusion checks took 3.1s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 200 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 177 mSDsluCounter, 532 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 333 mSDsCounter, 131 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 323 IncrementalHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 131 mSolverCounterUnsat, 199 mSDtfsCounter, 323 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq147 hnf94 smp100 dnf100 smp100 tf112 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 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! [2024-11-07 23:46:24,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-07 23:46:24,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-07 23:46:24,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-07 23:46:24,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/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