./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f1ed2bbae9bfc9fe23e20625a052e41a5dc8bd90714a305d96277dd3b876e5be --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:53:58,574 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:53:58,628 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-02-08 01:53:58,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:53:58,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:53:58,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:53:58,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:53:58,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:53:58,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:53:58,657 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:53:58,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:53:58,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:53:58,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:53:58,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:53:58,658 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:53:58,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:53:58,659 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:53:58,660 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:53:58,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:53:58,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:53:58,661 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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(G ! call(reach_error())) ) 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 -> f1ed2bbae9bfc9fe23e20625a052e41a5dc8bd90714a305d96277dd3b876e5be [2025-02-08 01:53:58,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:53:58,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:53:58,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:53:58,902 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:53:58,902 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:53:58,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2025-02-08 01:54:00,068 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c8d216637/110326459c484632b3dedfef2f2667e7/FLAG6d655f3a0 [2025-02-08 01:54:00,547 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:54:00,547 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2025-02-08 01:54:00,571 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c8d216637/110326459c484632b3dedfef2f2667e7/FLAG6d655f3a0 [2025-02-08 01:54:00,584 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c8d216637/110326459c484632b3dedfef2f2667e7 [2025-02-08 01:54:00,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:54:00,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:54:00,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:54:00,589 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:54:00,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:54:00,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:54:00" (1/1) ... [2025-02-08 01:54:00,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da30404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:00, skipping insertion in model container [2025-02-08 01:54:00,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:54:00" (1/1) ... [2025-02-08 01:54:00,660 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:54:00,866 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2025-02-08 01:54:00,872 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2025-02-08 01:54:01,324 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,325 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,325 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,327 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,327 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,336 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,337 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,338 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,338 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,340 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,340 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,340 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,341 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,635 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[150649,150662] [2025-02-08 01:54:01,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:54:01,645 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:54:01,654 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2025-02-08 01:54:01,654 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2025-02-08 01:54:01,691 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,691 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,691 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,692 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,692 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,701 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,702 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,702 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,703 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,704 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,705 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,705 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,705 WARN L1731 CHandler]: Possible shadowing of function index [2025-02-08 01:54:01,775 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[150649,150662] [2025-02-08 01:54:01,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:54:01,918 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:54:01,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01 WrapperNode [2025-02-08 01:54:01,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:54:01,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:54:01,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:54:01,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:54:01,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:01,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:01,985 INFO L138 Inliner]: procedures = 668, calls = 1048, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 86 [2025-02-08 01:54:01,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:54:01,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:54:01,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:54:01,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:54:01,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:01,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:01,996 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,014 INFO L175 MemorySlicer]: Split 30 memory accesses to 3 slices as follows [2, 5, 23]. 77 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 7 writes are split as follows [0, 0, 7]. [2025-02-08 01:54:02,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,031 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,035 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,038 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:54:02,044 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:54:02,044 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:54:02,044 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:54:02,045 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (1/1) ... [2025-02-08 01:54:02,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:54:02,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:02,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:54:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:54:02,089 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2025-02-08 01:54:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2025-02-08 01:54:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2025-02-08 01:54:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2025-02-08 01:54:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-08 01:54:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 01:54:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 01:54:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-08 01:54:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2025-02-08 01:54:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 01:54:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-08 01:54:02,251 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:54:02,253 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:54:02,296 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L4731: havoc #t~mem313.base, #t~mem313.offset;havoc #t~short314;havoc #t~mem315.base, #t~mem315.offset;havoc #t~mem316.base, #t~mem316.offset;havoc #t~short317; [2025-02-08 01:54:02,375 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L4720: havoc #t~mem308.base, #t~mem308.offset;havoc #t~short309;havoc #t~mem310.base, #t~mem310.offset;havoc #t~mem311.base, #t~mem311.offset;havoc #t~short312; [2025-02-08 01:54:02,492 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2025-02-08 01:54:02,492 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:54:02,502 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:54:02,502 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:54:02,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:54:02 BoogieIcfgContainer [2025-02-08 01:54:02,502 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:54:02,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:54:02,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:54:02,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:54:02,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:54:00" (1/3) ... [2025-02-08 01:54:02,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd79af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:54:02, skipping insertion in model container [2025-02-08 01:54:02,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:54:01" (2/3) ... [2025-02-08 01:54:02,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd79af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:54:02, skipping insertion in model container [2025-02-08 01:54:02,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:54:02" (3/3) ... [2025-02-08 01:54:02,512 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2025-02-08 01:54:02,521 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:54:02,523 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_remove_harness.i that has 10 procedures, 77 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-02-08 01:54:02,567 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:54:02,578 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67f17229, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:54:02,578 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-08 01:54:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2025-02-08 01:54:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-08 01:54:02,589 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:02,590 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:02,590 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:02,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1074276161, now seen corresponding path program 1 times [2025-02-08 01:54:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:02,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757287449] [2025-02-08 01:54:02,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:02,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-08 01:54:02,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-08 01:54:02,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:02,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 01:54:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757287449] [2025-02-08 01:54:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757287449] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964853559] [2025-02-08 01:54:02,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:02,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:02,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:02,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:54:03,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-08 01:54:03,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-08 01:54:03,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:03,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:03,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-08 01:54:03,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 01:54:03,073 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:54:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964853559] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:54:03,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:54:03,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-08 01:54:03,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290600230] [2025-02-08 01:54:03,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:54:03,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 01:54:03,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:03,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 01:54:03,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 01:54:03,096 INFO L87 Difference]: Start difference. First operand has 69 states, 43 states have (on average 1.302325581395349) internal successors, (56), 45 states have internal predecessors, (56), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-08 01:54:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:03,117 INFO L93 Difference]: Finished difference Result 133 states and 183 transitions. [2025-02-08 01:54:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 01:54:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2025-02-08 01:54:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:03,123 INFO L225 Difference]: With dead ends: 133 [2025-02-08 01:54:03,124 INFO L226 Difference]: Without dead ends: 66 [2025-02-08 01:54:03,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 01:54:03,130 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:03,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 01:54:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-08 01:54:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-02-08 01:54:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-08 01:54:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2025-02-08 01:54:03,167 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 46 [2025-02-08 01:54:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:03,169 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2025-02-08 01:54:03,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-08 01:54:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2025-02-08 01:54:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-08 01:54:03,170 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:03,170 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:03,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 01:54:03,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-08 01:54:03,371 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:03,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -925416750, now seen corresponding path program 1 times [2025-02-08 01:54:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457997020] [2025-02-08 01:54:03,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:03,404 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-08 01:54:03,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-08 01:54:03,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:03,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:04,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457997020] [2025-02-08 01:54:04,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457997020] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:54:04,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:54:04,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 01:54:04,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172989100] [2025-02-08 01:54:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:54:04,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 01:54:04,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:04,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 01:54:04,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-08 01:54:04,047 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-08 01:54:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:04,283 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2025-02-08 01:54:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 01:54:04,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2025-02-08 01:54:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:04,286 INFO L225 Difference]: With dead ends: 133 [2025-02-08 01:54:04,287 INFO L226 Difference]: Without dead ends: 74 [2025-02-08 01:54:04,288 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-08 01:54:04,288 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 12 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:04,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 490 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 01:54:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-08 01:54:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2025-02-08 01:54:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2025-02-08 01:54:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2025-02-08 01:54:04,303 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 53 [2025-02-08 01:54:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:04,304 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2025-02-08 01:54:04,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-08 01:54:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2025-02-08 01:54:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-08 01:54:04,305 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:04,305 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:04,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 01:54:04,305 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:04,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1084687091, now seen corresponding path program 1 times [2025-02-08 01:54:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:04,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479089144] [2025-02-08 01:54:04,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:04,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-08 01:54:04,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-08 01:54:04,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:04,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:04,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:04,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479089144] [2025-02-08 01:54:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479089144] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:54:04,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:54:04,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 01:54:04,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660480422] [2025-02-08 01:54:04,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:54:04,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 01:54:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:04,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 01:54:04,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-08 01:54:04,612 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2025-02-08 01:54:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:04,663 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2025-02-08 01:54:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:54:04,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 53 [2025-02-08 01:54:04,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:04,665 INFO L225 Difference]: With dead ends: 81 [2025-02-08 01:54:04,666 INFO L226 Difference]: Without dead ends: 79 [2025-02-08 01:54:04,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-08 01:54:04,667 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 3 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:04,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 390 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 01:54:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-08 01:54:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2025-02-08 01:54:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 52 states have internal predecessors, (59), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2025-02-08 01:54:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2025-02-08 01:54:04,675 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 53 [2025-02-08 01:54:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:04,675 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2025-02-08 01:54:04,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2025-02-08 01:54:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2025-02-08 01:54:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-08 01:54:04,676 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:04,676 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:04,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:54:04,677 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:04,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1769979121, now seen corresponding path program 1 times [2025-02-08 01:54:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:04,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711649994] [2025-02-08 01:54:04,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:04,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-08 01:54:04,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-08 01:54:04,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:04,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711649994] [2025-02-08 01:54:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711649994] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:54:04,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:54:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:54:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571790939] [2025-02-08 01:54:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:54:04,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:54:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:04,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:54:04,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:54:04,874 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-08 01:54:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:04,892 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2025-02-08 01:54:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:54:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2025-02-08 01:54:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:04,894 INFO L225 Difference]: With dead ends: 139 [2025-02-08 01:54:04,895 INFO L226 Difference]: Without dead ends: 79 [2025-02-08 01:54:04,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:54:04,895 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:04,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 241 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 01:54:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-08 01:54:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-02-08 01:54:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2025-02-08 01:54:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2025-02-08 01:54:04,907 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 54 [2025-02-08 01:54:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:04,908 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2025-02-08 01:54:04,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-08 01:54:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2025-02-08 01:54:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-08 01:54:04,908 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:04,909 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:04,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 01:54:04,909 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:04,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:04,909 INFO L85 PathProgramCache]: Analyzing trace with hash 548411904, now seen corresponding path program 1 times [2025-02-08 01:54:04,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:04,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743242265] [2025-02-08 01:54:04,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:04,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:04,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-08 01:54:04,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-08 01:54:04,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:04,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:05,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743242265] [2025-02-08 01:54:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743242265] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162222899] [2025-02-08 01:54:05,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:05,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:05,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:05,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:54:05,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-08 01:54:05,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-08 01:54:05,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:05,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:05,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-02-08 01:54:05,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:05,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:54:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:54:05,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:06,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-02-08 01:54:06,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-02-08 01:54:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:06,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162222899] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:06,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:06,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 10] total 25 [2025-02-08 01:54:06,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360231744] [2025-02-08 01:54:06,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:06,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 01:54:06,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:06,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 01:54:06,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2025-02-08 01:54:06,142 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:06,851 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2025-02-08 01:54:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-08 01:54:06,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 55 [2025-02-08 01:54:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:06,853 INFO L225 Difference]: With dead ends: 169 [2025-02-08 01:54:06,853 INFO L226 Difference]: Without dead ends: 104 [2025-02-08 01:54:06,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 01:54:06,854 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 79 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:06,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1085 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-08 01:54:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-08 01:54:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-02-08 01:54:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2025-02-08 01:54:06,872 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 55 [2025-02-08 01:54:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:06,873 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2025-02-08 01:54:06,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2025-02-08 01:54:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-08 01:54:06,876 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:06,876 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:06,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 01:54:07,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:07,076 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:07,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1234470832, now seen corresponding path program 1 times [2025-02-08 01:54:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:07,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623543332] [2025-02-08 01:54:07,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:07,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:07,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-08 01:54:07,125 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-08 01:54:07,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:07,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-08 01:54:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623543332] [2025-02-08 01:54:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623543332] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133362545] [2025-02-08 01:54:07,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:07,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:07,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:07,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:07,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 01:54:07,385 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-02-08 01:54:07,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-02-08 01:54:07,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:07,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:07,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-08 01:54:07,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:07,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:54:07,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:54:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:54:07,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:08,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-02-08 01:54:08,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2025-02-08 01:54:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133362545] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:08,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 12] total 30 [2025-02-08 01:54:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917158756] [2025-02-08 01:54:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:08,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-08 01:54:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:08,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-08 01:54:08,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2025-02-08 01:54:08,324 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 30 states, 29 states have (on average 2.413793103448276) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:09,361 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2025-02-08 01:54:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-08 01:54:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.413793103448276) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 58 [2025-02-08 01:54:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:09,362 INFO L225 Difference]: With dead ends: 161 [2025-02-08 01:54:09,362 INFO L226 Difference]: Without dead ends: 102 [2025-02-08 01:54:09,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2025-02-08 01:54:09,364 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 72 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:09,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1567 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-08 01:54:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-02-08 01:54:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2025-02-08 01:54:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 68 states have internal predecessors, (81), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:09,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2025-02-08 01:54:09,380 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 58 [2025-02-08 01:54:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:09,380 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2025-02-08 01:54:09,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.413793103448276) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2025-02-08 01:54:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-02-08 01:54:09,381 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:09,381 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:09,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 01:54:09,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:09,582 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:09,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash 903824350, now seen corresponding path program 2 times [2025-02-08 01:54:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:09,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414835447] [2025-02-08 01:54:09,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:54:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:09,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-02-08 01:54:09,649 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-08 01:54:09,649 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:54:09,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 01:54:09,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:09,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414835447] [2025-02-08 01:54:09,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414835447] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:09,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362772380] [2025-02-08 01:54:09,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:54:09,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:09,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:09,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:09,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 01:54:09,943 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-02-08 01:54:10,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-02-08 01:54:10,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:54:10,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:10,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-08 01:54:10,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 01:54:10,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 01:54:10,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362772380] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:10,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:10,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-02-08 01:54:10,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832511414] [2025-02-08 01:54:10,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:10,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 01:54:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:10,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 01:54:10,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:54:10,147 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-08 01:54:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:10,245 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2025-02-08 01:54:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 01:54:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2025-02-08 01:54:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:10,247 INFO L225 Difference]: With dead ends: 162 [2025-02-08 01:54:10,247 INFO L226 Difference]: Without dead ends: 101 [2025-02-08 01:54:10,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2025-02-08 01:54:10,248 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:10,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 402 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 01:54:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-02-08 01:54:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2025-02-08 01:54:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 73 states have internal predecessors, (86), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2025-02-08 01:54:10,256 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 61 [2025-02-08 01:54:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:10,256 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2025-02-08 01:54:10,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-02-08 01:54:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2025-02-08 01:54:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-02-08 01:54:10,257 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:10,257 INFO L218 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:10,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 01:54:10,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-08 01:54:10,458 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:10,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1917029457, now seen corresponding path program 3 times [2025-02-08 01:54:10,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047609348] [2025-02-08 01:54:10,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:54:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:10,484 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 66 statements into 5 equivalence classes. [2025-02-08 01:54:10,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 66 of 66 statements. [2025-02-08 01:54:10,611 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-08 01:54:10,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 01:54:10,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:10,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047609348] [2025-02-08 01:54:10,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047609348] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:10,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682148846] [2025-02-08 01:54:10,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:54:10,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:10,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:10,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:10,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 01:54:11,045 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 66 statements into 5 equivalence classes. [2025-02-08 01:54:12,031 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 66 of 66 statements. [2025-02-08 01:54:12,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-08 01:54:12,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:12,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 101 conjuncts are in the unsatisfiable core [2025-02-08 01:54:12,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:12,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:54:12,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:54:12,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:12,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-02-08 01:54:12,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:12,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-08 01:54:12,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:12,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-08 01:54:12,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:12,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-08 01:54:12,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:12,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-02-08 01:54:12,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:12,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-02-08 01:54:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:13,218 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:15,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 111 [2025-02-08 01:54:15,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:15,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 149 [2025-02-08 01:54:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:15,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682148846] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:15,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:15,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 18] total 48 [2025-02-08 01:54:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566721513] [2025-02-08 01:54:15,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:15,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-08 01:54:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:15,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-08 01:54:15,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2025-02-08 01:54:15,531 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:17,270 INFO L93 Difference]: Finished difference Result 171 states and 210 transitions. [2025-02-08 01:54:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-08 01:54:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 66 [2025-02-08 01:54:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:17,271 INFO L225 Difference]: With dead ends: 171 [2025-02-08 01:54:17,271 INFO L226 Difference]: Without dead ends: 108 [2025-02-08 01:54:17,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=343, Invalid=3079, Unknown=0, NotChecked=0, Total=3422 [2025-02-08 01:54:17,273 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 76 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:17,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1676 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-08 01:54:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-02-08 01:54:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2025-02-08 01:54:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 76 states have internal predecessors, (87), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2025-02-08 01:54:17,290 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 66 [2025-02-08 01:54:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:17,291 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2025-02-08 01:54:17,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2025-02-08 01:54:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-08 01:54:17,291 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:17,291 INFO L218 NwaCegarLoop]: trace histogram [9, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:17,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 01:54:17,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:17,492 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:17,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1991269251, now seen corresponding path program 4 times [2025-02-08 01:54:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:17,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328293877] [2025-02-08 01:54:17,492 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:54:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:17,516 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-02-08 01:54:17,563 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 01:54:17,563 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:54:17,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-08 01:54:17,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328293877] [2025-02-08 01:54:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328293877] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485648482] [2025-02-08 01:54:17,893 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:54:17,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:17,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:17,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:17,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 01:54:18,022 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-02-08 01:54:18,303 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 01:54:18,303 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:54:18,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:18,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 103 conjuncts are in the unsatisfiable core [2025-02-08 01:54:18,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:18,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:54:18,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:54:18,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-02-08 01:54:18,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-08 01:54:18,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-08 01:54:18,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-08 01:54:18,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-02-08 01:54:18,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-02-08 01:54:18,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:18,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-02-08 01:54:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:54:19,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:22,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2025-02-08 01:54:22,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2025-02-08 01:54:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:23,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485648482] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:23,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:23,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27, 22] total 57 [2025-02-08 01:54:23,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773404086] [2025-02-08 01:54:23,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:23,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-08 01:54:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:23,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-08 01:54:23,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2025-02-08 01:54:23,008 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 54 states have internal predecessors, (99), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:25,097 INFO L93 Difference]: Finished difference Result 176 states and 211 transitions. [2025-02-08 01:54:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-08 01:54:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 54 states have internal predecessors, (99), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 69 [2025-02-08 01:54:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:25,098 INFO L225 Difference]: With dead ends: 176 [2025-02-08 01:54:25,098 INFO L226 Difference]: Without dead ends: 113 [2025-02-08 01:54:25,099 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=363, Invalid=4059, Unknown=0, NotChecked=0, Total=4422 [2025-02-08 01:54:25,100 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 79 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:25,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2323 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-08 01:54:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-02-08 01:54:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2025-02-08 01:54:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2025-02-08 01:54:25,121 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 69 [2025-02-08 01:54:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:25,123 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2025-02-08 01:54:25,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 54 states have internal predecessors, (99), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2025-02-08 01:54:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-02-08 01:54:25,124 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:25,124 INFO L218 NwaCegarLoop]: trace histogram [10, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:25,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 01:54:25,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-08 01:54:25,324 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:25,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1565096499, now seen corresponding path program 5 times [2025-02-08 01:54:25,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:25,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035929826] [2025-02-08 01:54:25,325 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:54:25,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:25,350 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 72 statements into 6 equivalence classes. [2025-02-08 01:54:25,525 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 72 of 72 statements. [2025-02-08 01:54:25,525 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-08 01:54:25,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-08 01:54:26,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:26,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035929826] [2025-02-08 01:54:26,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035929826] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:26,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924792981] [2025-02-08 01:54:26,147 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:54:26,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:26,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:26,149 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:26,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 01:54:26,298 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 72 statements into 6 equivalence classes. [2025-02-08 01:54:29,268 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 72 of 72 statements. [2025-02-08 01:54:29,268 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-08 01:54:29,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:29,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 112 conjuncts are in the unsatisfiable core [2025-02-08 01:54:29,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:29,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:54:29,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:54:29,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-02-08 01:54:29,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-08 01:54:29,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-08 01:54:29,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-08 01:54:29,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-02-08 01:54:29,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-02-08 01:54:29,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-02-08 01:54:29,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:29,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-02-08 01:54:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:54:30,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:35,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2025-02-08 01:54:35,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 115 [2025-02-08 01:54:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924792981] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:35,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:35,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 24] total 61 [2025-02-08 01:54:35,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719827694] [2025-02-08 01:54:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:35,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-02-08 01:54:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:35,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-02-08 01:54:35,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3344, Unknown=0, NotChecked=0, Total=3660 [2025-02-08 01:54:35,562 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 61 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 57 states have internal predecessors, (106), 8 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:39,531 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2025-02-08 01:54:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-08 01:54:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 57 states have internal predecessors, (106), 8 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 72 [2025-02-08 01:54:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:39,534 INFO L225 Difference]: With dead ends: 182 [2025-02-08 01:54:39,534 INFO L226 Difference]: Without dead ends: 117 [2025-02-08 01:54:39,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=540, Invalid=6432, Unknown=0, NotChecked=0, Total=6972 [2025-02-08 01:54:39,536 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 85 mSDsluCounter, 2077 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:39,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 2150 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-02-08 01:54:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-02-08 01:54:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2025-02-08 01:54:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 1.1875) internal successors, (95), 82 states have internal predecessors, (95), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2025-02-08 01:54:39,552 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 72 [2025-02-08 01:54:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:39,552 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2025-02-08 01:54:39,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 57 states have internal predecessors, (106), 8 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:54:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2025-02-08 01:54:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-08 01:54:39,553 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:39,553 INFO L218 NwaCegarLoop]: trace histogram [11, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:39,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 01:54:39,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:39,757 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:39,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2025787355, now seen corresponding path program 6 times [2025-02-08 01:54:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:39,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50230762] [2025-02-08 01:54:39,758 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:54:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:39,785 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 75 statements into 7 equivalence classes. [2025-02-08 01:54:39,936 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 75 of 75 statements. [2025-02-08 01:54:39,936 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-08 01:54:39,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-08 01:54:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:54:40,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50230762] [2025-02-08 01:54:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50230762] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:54:40,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66687542] [2025-02-08 01:54:40,405 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:54:40,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:40,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:54:40,408 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:54:40,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 01:54:40,579 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 75 statements into 7 equivalence classes. [2025-02-08 01:54:44,793 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 75 of 75 statements. [2025-02-08 01:54:44,793 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-08 01:54:44,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:54:44,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 179 conjuncts are in the unsatisfiable core [2025-02-08 01:54:44,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:54:44,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 65 [2025-02-08 01:54:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,851 INFO L349 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2025-02-08 01:54:44,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2462 treesize of output 2395 [2025-02-08 01:54:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 93 [2025-02-08 01:54:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2025-02-08 01:54:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 139 [2025-02-08 01:54:44,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-02-08 01:54:44,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 109 [2025-02-08 01:54:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 01:54:44,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2025-02-08 01:54:44,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-02-08 01:54:44,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-02-08 01:54:44,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 42 [2025-02-08 01:54:44,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-02-08 01:54:45,412 INFO L349 Elim1Store]: treesize reduction 70, result has 57.6 percent of original size [2025-02-08 01:54:45,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 117 treesize of output 153 [2025-02-08 01:54:45,430 INFO L349 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2025-02-08 01:54:45,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 101 treesize of output 75 [2025-02-08 01:54:45,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:54:45,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:54:45,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:45,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-02-08 01:54:45,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:45,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-08 01:54:45,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:45,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-08 01:54:45,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:45,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-08 01:54:45,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:45,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-02-08 01:54:45,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:45,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-02-08 01:54:46,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:46,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-02-08 01:54:46,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:46,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-02-08 01:54:46,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:54:46,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2025-02-08 01:54:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:54:47,700 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:54:53,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2025-02-08 01:54:53,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 124 [2025-02-08 01:54:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 55 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:54:53,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66687542] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:54:53,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:54:53,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 35, 26] total 71 [2025-02-08 01:54:53,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273240845] [2025-02-08 01:54:53,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:54:53,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-02-08 01:54:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:54:53,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-02-08 01:54:53,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=4595, Unknown=0, NotChecked=0, Total=4970 [2025-02-08 01:54:53,361 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 71 states, 68 states have (on average 1.75) internal successors, (119), 66 states have internal predecessors, (119), 9 states have call successors, (19), 6 states have call predecessors, (19), 8 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2025-02-08 01:54:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:54:56,813 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2025-02-08 01:54:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-08 01:54:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 68 states have (on average 1.75) internal successors, (119), 66 states have internal predecessors, (119), 9 states have call successors, (19), 6 states have call predecessors, (19), 8 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 75 [2025-02-08 01:54:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:54:56,819 INFO L225 Difference]: With dead ends: 192 [2025-02-08 01:54:56,819 INFO L226 Difference]: Without dead ends: 125 [2025-02-08 01:54:56,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=487, Invalid=6823, Unknown=0, NotChecked=0, Total=7310 [2025-02-08 01:54:56,821 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 99 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-02-08 01:54:56,822 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 2139 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-02-08 01:54:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-02-08 01:54:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2025-02-08 01:54:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.186046511627907) internal successors, (102), 88 states have internal predecessors, (102), 18 states have call successors, (18), 11 states have call predecessors, (18), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2025-02-08 01:54:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2025-02-08 01:54:56,861 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 75 [2025-02-08 01:54:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:54:56,862 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2025-02-08 01:54:56,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 68 states have (on average 1.75) internal successors, (119), 66 states have internal predecessors, (119), 9 states have call successors, (19), 6 states have call predecessors, (19), 8 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2025-02-08 01:54:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2025-02-08 01:54:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-02-08 01:54:56,866 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:54:56,866 INFO L218 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:54:56,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 01:54:57,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:54:57,067 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:54:57,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:54:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1149719366, now seen corresponding path program 1 times [2025-02-08 01:54:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:54:57,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190899909] [2025-02-08 01:54:57,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:54:57,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:54:57,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-02-08 01:54:57,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-02-08 01:54:57,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:54:57,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:55:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 01:55:00,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:55:00,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190899909] [2025-02-08 01:55:00,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190899909] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:55:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750506581] [2025-02-08 01:55:00,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:55:00,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:55:00,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:55:00,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:55:00,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 01:55:01,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-02-08 01:55:01,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-02-08 01:55:01,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:55:01,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:55:01,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-08 01:55:01,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:55:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-08 01:55:01,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:55:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-08 01:55:01,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750506581] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:55:01,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:55:01,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 7] total 35 [2025-02-08 01:55:01,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265179858] [2025-02-08 01:55:01,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:55:01,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-08 01:55:01,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:55:01,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-08 01:55:01,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2025-02-08 01:55:01,544 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 5 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2025-02-08 01:55:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:55:02,716 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2025-02-08 01:55:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-08 01:55:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 5 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 78 [2025-02-08 01:55:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:55:02,718 INFO L225 Difference]: With dead ends: 176 [2025-02-08 01:55:02,720 INFO L226 Difference]: Without dead ends: 130 [2025-02-08 01:55:02,722 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2025-02-08 01:55:02,722 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 22 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-08 01:55:02,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1759 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-08 01:55:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-02-08 01:55:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2025-02-08 01:55:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 19 states have call successors, (19), 12 states have call predecessors, (19), 13 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2025-02-08 01:55:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2025-02-08 01:55:02,758 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 78 [2025-02-08 01:55:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:55:02,758 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2025-02-08 01:55:02,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 5 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2025-02-08 01:55:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2025-02-08 01:55:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-02-08 01:55:02,762 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:55:02,763 INFO L218 NwaCegarLoop]: trace histogram [12, 7, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:55:02,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 01:55:02,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:55:02,964 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:55:02,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:55:02,965 INFO L85 PathProgramCache]: Analyzing trace with hash -381325077, now seen corresponding path program 7 times [2025-02-08 01:55:02,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:55:02,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23058985] [2025-02-08 01:55:02,965 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:55:02,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:55:02,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-02-08 01:55:03,055 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-02-08 01:55:03,056 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:55:03,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:55:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 01:55:03,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:55:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23058985] [2025-02-08 01:55:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23058985] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:55:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961985662] [2025-02-08 01:55:03,443 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:55:03,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:55:03,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:55:03,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:55:03,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 01:55:03,628 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-02-08 01:55:03,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-02-08 01:55:03,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:55:03,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:55:03,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 131 conjuncts are in the unsatisfiable core [2025-02-08 01:55:03,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:55:04,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:55:04,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:55:04,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-02-08 01:55:04,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-08 01:55:04,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-08 01:55:04,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-08 01:55:04,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-02-08 01:55:04,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-02-08 01:55:04,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-02-08 01:55:04,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-02-08 01:55:04,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2025-02-08 01:55:04,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:04,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2025-02-08 01:55:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 01:55:06,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:55:12,477 WARN L286 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 169 DAG size of output: 164 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2025-02-08 01:55:13,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2025-02-08 01:55:13,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 133 [2025-02-08 01:55:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 01:55:14,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961985662] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:55:14,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:55:14,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 27] total 70 [2025-02-08 01:55:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587355746] [2025-02-08 01:55:14,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:55:14,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-02-08 01:55:14,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:55:14,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-02-08 01:55:14,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=4343, Unknown=0, NotChecked=0, Total=4830 [2025-02-08 01:55:14,065 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 70 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 67 states have internal predecessors, (120), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:55:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 01:55:17,906 INFO L93 Difference]: Finished difference Result 206 states and 239 transitions. [2025-02-08 01:55:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-08 01:55:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 67 states have internal predecessors, (120), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 78 [2025-02-08 01:55:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 01:55:17,908 INFO L225 Difference]: With dead ends: 206 [2025-02-08 01:55:17,908 INFO L226 Difference]: Without dead ends: 129 [2025-02-08 01:55:17,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=596, Invalid=5884, Unknown=0, NotChecked=0, Total=6480 [2025-02-08 01:55:17,910 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 71 mSDsluCounter, 2661 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2025-02-08 01:55:17,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 2736 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2025-02-08 01:55:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-02-08 01:55:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2025-02-08 01:55:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 96 states have internal predecessors, (106), 19 states have call successors, (19), 12 states have call predecessors, (19), 13 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2025-02-08 01:55:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2025-02-08 01:55:17,944 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 78 [2025-02-08 01:55:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 01:55:17,944 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2025-02-08 01:55:17,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.7391304347826086) internal successors, (120), 67 states have internal predecessors, (120), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-02-08 01:55:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2025-02-08 01:55:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-08 01:55:17,945 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 01:55:17,945 INFO L218 NwaCegarLoop]: trace histogram [13, 8, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:55:17,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 01:55:18,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-08 01:55:18,149 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-08 01:55:18,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:55:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1276148679, now seen corresponding path program 8 times [2025-02-08 01:55:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:55:18,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552907250] [2025-02-08 01:55:18,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:55:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:55:18,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 81 statements into 2 equivalence classes. [2025-02-08 01:55:18,216 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-08 01:55:18,216 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:55:18,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:55:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-08 01:55:18,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:55:18,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552907250] [2025-02-08 01:55:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552907250] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:55:18,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18145257] [2025-02-08 01:55:18,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:55:18,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:55:18,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:55:18,596 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:55:18,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 01:55:18,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 81 statements into 2 equivalence classes. [2025-02-08 01:55:19,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-08 01:55:19,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:55:19,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:55:19,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 145 conjuncts are in the unsatisfiable core [2025-02-08 01:55:19,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:55:19,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-08 01:55:19,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-02-08 01:55:19,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-02-08 01:55:19,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-02-08 01:55:19,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-02-08 01:55:19,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-02-08 01:55:19,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-02-08 01:55:19,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-02-08 01:55:19,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-02-08 01:55:19,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-02-08 01:55:19,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2025-02-08 01:55:19,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2025-02-08 01:55:19,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:55:19,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2025-02-08 01:55:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-08 01:55:20,082 INFO L312 TraceCheckSpWp]: Computing backward predicates...