./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 551b0097 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-?-551b009-m [2025-01-09 17:22:58,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 17:22:58,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-01-09 17:22:58,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 17:22:58,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 17:22:58,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 17:22:58,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 17:22:58,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 17:22:58,288 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 17:22:58,288 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 17:22:58,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 17:22:58,289 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 17:22:58,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 17:22:58,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 17:22:58,289 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 17:22:58,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 17:22:58,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 17:22:58,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 17:22:58,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 17:22:58,291 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 17:22:58,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 17:22:58,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 17:22:58,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:22:58,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 17:22:58,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:22:58,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 17:22:58,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 17:22:58,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 17:22:58,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 17:22:58,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 17:22:58,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 17:22:58,294 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 [2025-01-09 17:22:58,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 17:22:58,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 17:22:58,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 17:22:58,576 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 17:22:58,577 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 17:22:58,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2025-01-09 17:22:59,849 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b9f446fb4/329484ba533f4d889f55a1f361c86e6a/FLAG259ecf905 [2025-01-09 17:23:00,311 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 17:23:00,313 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2025-01-09 17:23:00,348 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b9f446fb4/329484ba533f4d889f55a1f361c86e6a/FLAG259ecf905 [2025-01-09 17:23:00,364 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b9f446fb4/329484ba533f4d889f55a1f361c86e6a [2025-01-09 17:23:00,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 17:23:00,368 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 17:23:00,369 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 17:23:00,369 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 17:23:00,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 17:23:00,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 05:23:00" (1/1) ... [2025-01-09 17:23:00,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2366f2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:00, skipping insertion in model container [2025-01-09 17:23:00,374 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 05:23:00" (1/1) ... [2025-01-09 17:23:00,465 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 17:23:00,719 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] [2025-01-09 17:23:00,728 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] [2025-01-09 17:23:01,455 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,456 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,456 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,457 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,458 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,470 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,470 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,472 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,472 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,474 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,475 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,475 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,476 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,852 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] [2025-01-09 17:23:01,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 17:23:01,874 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 17:23:01,887 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] [2025-01-09 17:23:01,887 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] [2025-01-09 17:23:01,945 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,946 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,946 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,946 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,947 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,954 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,954 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,955 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,955 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,956 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,957 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,957 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:01,957 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:23:02,070 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] [2025-01-09 17:23:02,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 17:23:02,242 INFO L204 MainTranslator]: Completed translation [2025-01-09 17:23:02,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02 WrapperNode [2025-01-09 17:23:02,243 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 17:23:02,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 17:23:02,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 17:23:02,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 17:23:02,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,352 INFO L138 Inliner]: procedures = 668, calls = 1048, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 86 [2025-01-09 17:23:02,353 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 17:23:02,353 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 17:23:02,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 17:23:02,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 17:23:02,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,365 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,383 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]. [2025-01-09 17:23:02,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,400 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,405 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,408 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,428 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 17:23:02,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 17:23:02,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 17:23:02,429 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 17:23:02,429 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (1/1) ... [2025-01-09 17:23:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:23:02,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:02,462 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) [2025-01-09 17:23:02,469 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 [2025-01-09 17:23:02,486 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2025-01-09 17:23:02,487 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2025-01-09 17:23:02,487 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2025-01-09 17:23:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2025-01-09 17:23:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 17:23:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 17:23:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 17:23:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 17:23:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 17:23:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 17:23:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2025-01-09 17:23:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 17:23:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-01-09 17:23:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-01-09 17:23:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-01-09 17:23:02,490 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-01-09 17:23:02,490 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-01-09 17:23:02,491 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 17:23:02,491 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 17:23:02,491 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2025-01-09 17:23:02,492 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2025-01-09 17:23:02,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 17:23:02,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 17:23:02,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 17:23:02,711 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 17:23:02,714 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 17:23:02,987 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2025-01-09 17:23:02,988 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 17:23:02,999 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 17:23:03,002 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 17:23:03,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 05:23:03 BoogieIcfgContainer [2025-01-09 17:23:03,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 17:23:03,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 17:23:03,005 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 17:23:03,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 17:23:03,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 05:23:00" (1/3) ... [2025-01-09 17:23:03,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16271c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 05:23:03, skipping insertion in model container [2025-01-09 17:23:03,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:23:02" (2/3) ... [2025-01-09 17:23:03,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16271c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 05:23:03, skipping insertion in model container [2025-01-09 17:23:03,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 05:23:03" (3/3) ... [2025-01-09 17:23:03,013 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2025-01-09 17:23:03,028 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 17:23:03,030 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_remove_harness.i that has 10 procedures, 80 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-01-09 17:23:03,083 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 17:23:03,094 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;@237a60b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 17:23:03,096 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 17:23:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 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) [2025-01-09 17:23:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-09 17:23:03,105 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:03,106 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] [2025-01-09 17:23:03,107 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:03,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1885059215, now seen corresponding path program 1 times [2025-01-09 17:23:03,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739485956] [2025-01-09 17:23:03,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:03,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:03,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-09 17:23:03,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-09 17:23:03,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:03,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 17:23:03,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:03,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739485956] [2025-01-09 17:23:03,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739485956] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:03,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297580635] [2025-01-09 17:23:03,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:03,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:03,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:03,502 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) [2025-01-09 17:23:03,504 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 [2025-01-09 17:23:03,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-09 17:23:03,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-09 17:23:03,720 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:03,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:03,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 17:23:03,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 17:23:03,744 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:23:03,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297580635] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:23:03,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:23:03,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 17:23:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819185918] [2025-01-09 17:23:03,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:23:03,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 17:23:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:03,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 17:23:03,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 17:23:03,766 INFO L87 Difference]: Start difference. First operand has 72 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2025-01-09 17:23:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:03,790 INFO L93 Difference]: Finished difference Result 138 states and 188 transitions. [2025-01-09 17:23:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 17:23:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 47 [2025-01-09 17:23:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:03,799 INFO L225 Difference]: With dead ends: 138 [2025-01-09 17:23:03,799 INFO L226 Difference]: Without dead ends: 67 [2025-01-09 17:23:03,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 17:23:03,806 INFO L435 NwaCegarLoop]: 89 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, 89 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 [2025-01-09 17:23:03,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:23:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-01-09 17:23:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-01-09 17:23:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 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) [2025-01-09 17:23:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2025-01-09 17:23:03,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 47 [2025-01-09 17:23:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:03,847 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2025-01-09 17:23:03,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2025-01-09 17:23:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2025-01-09 17:23:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-01-09 17:23:03,849 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:03,849 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] [2025-01-09 17:23:03,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 17:23:04,053 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 [2025-01-09 17:23:04,053 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:04,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash 843752022, now seen corresponding path program 1 times [2025-01-09 17:23:04,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:04,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331881836] [2025-01-09 17:23:04,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:04,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:04,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-09 17:23:04,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-09 17:23:04,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:04,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:05,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:05,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331881836] [2025-01-09 17:23:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331881836] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:23:05,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 17:23:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 17:23:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145490294] [2025-01-09 17:23:05,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:23:05,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 17:23:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:05,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 17:23:05,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-01-09 17:23:05,018 INFO L87 Difference]: Start difference. First operand 67 states and 84 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) [2025-01-09 17:23:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:05,272 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2025-01-09 17:23:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 17:23:05,273 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 [2025-01-09 17:23:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:05,275 INFO L225 Difference]: With dead ends: 134 [2025-01-09 17:23:05,275 INFO L226 Difference]: Without dead ends: 75 [2025-01-09 17:23:05,276 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 [2025-01-09 17:23:05,277 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 12 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:05,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 438 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:23:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-01-09 17:23:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2025-01-09 17:23:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 48 states have internal predecessors, (56), 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) [2025-01-09 17:23:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2025-01-09 17:23:05,296 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 53 [2025-01-09 17:23:05,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:05,298 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2025-01-09 17:23:05,298 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) [2025-01-09 17:23:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2025-01-09 17:23:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-01-09 17:23:05,300 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:05,300 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] [2025-01-09 17:23:05,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 17:23:05,301 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:05,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash 142152148, now seen corresponding path program 1 times [2025-01-09 17:23:05,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:05,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884247260] [2025-01-09 17:23:05,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:05,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:05,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-09 17:23:05,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-09 17:23:05,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:05,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:05,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884247260] [2025-01-09 17:23:05,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884247260] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:23:05,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 17:23:05,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 17:23:05,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120879200] [2025-01-09 17:23:05,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:23:05,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 17:23:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:05,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 17:23:05,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 17:23:05,733 INFO L87 Difference]: Start difference. First operand 72 states and 90 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) [2025-01-09 17:23:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:05,782 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2025-01-09 17:23:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 17:23:05,783 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 [2025-01-09 17:23:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:05,784 INFO L225 Difference]: With dead ends: 82 [2025-01-09 17:23:05,784 INFO L226 Difference]: Without dead ends: 80 [2025-01-09 17:23:05,784 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 [2025-01-09 17:23:05,785 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:05,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 394 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:23:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-01-09 17:23:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2025-01-09 17:23:05,795 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) [2025-01-09 17:23:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2025-01-09 17:23:05,799 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 53 [2025-01-09 17:23:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:05,800 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2025-01-09 17:23:05,800 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) [2025-01-09 17:23:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2025-01-09 17:23:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-01-09 17:23:05,801 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:05,801 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] [2025-01-09 17:23:05,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 17:23:05,801 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:05,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash 278469573, now seen corresponding path program 1 times [2025-01-09 17:23:05,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:05,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711699519] [2025-01-09 17:23:05,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:05,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:05,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 17:23:05,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 17:23:05,907 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:05,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:06,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:06,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711699519] [2025-01-09 17:23:06,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711699519] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:23:06,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 17:23:06,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 17:23:06,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480493212] [2025-01-09 17:23:06,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:23:06,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 17:23:06,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:06,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 17:23:06,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 17:23:06,091 INFO L87 Difference]: Start difference. First operand 79 states and 97 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) [2025-01-09 17:23:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:06,113 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2025-01-09 17:23:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 17:23:06,114 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 [2025-01-09 17:23:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:06,115 INFO L225 Difference]: With dead ends: 141 [2025-01-09 17:23:06,115 INFO L226 Difference]: Without dead ends: 80 [2025-01-09 17:23:06,115 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 [2025-01-09 17:23:06,116 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 244 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 [2025-01-09 17:23:06,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 244 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:23:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-01-09 17:23:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2025-01-09 17:23:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 54 states have internal predecessors, (61), 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) [2025-01-09 17:23:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2025-01-09 17:23:06,127 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 54 [2025-01-09 17:23:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:06,128 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2025-01-09 17:23:06,128 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) [2025-01-09 17:23:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2025-01-09 17:23:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-09 17:23:06,129 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:06,129 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] [2025-01-09 17:23:06,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 17:23:06,129 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:06,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:06,130 INFO L85 PathProgramCache]: Analyzing trace with hash 826800311, now seen corresponding path program 1 times [2025-01-09 17:23:06,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:06,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432649003] [2025-01-09 17:23:06,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:06,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:06,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 17:23:06,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 17:23:06,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:06,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:06,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:06,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432649003] [2025-01-09 17:23:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432649003] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:06,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775314498] [2025-01-09 17:23:06,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:06,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:06,450 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) [2025-01-09 17:23:06,453 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 [2025-01-09 17:23:06,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 17:23:06,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 17:23:06,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:06,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:06,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-01-09 17:23:06,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:06,839 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 [2025-01-09 17:23:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 17:23:07,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:07,590 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 [2025-01-09 17:23:07,596 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 [2025-01-09 17:23:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:07,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775314498] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:07,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:07,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 10] total 26 [2025-01-09 17:23:07,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904208852] [2025-01-09 17:23:07,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:07,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 17:23:07,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:07,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 17:23:07,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2025-01-09 17:23:07,687 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 26 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2025-01-09 17:23:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:08,953 INFO L93 Difference]: Finished difference Result 171 states and 208 transitions. [2025-01-09 17:23:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-09 17:23:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 [2025-01-09 17:23:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:08,957 INFO L225 Difference]: With dead ends: 171 [2025-01-09 17:23:08,957 INFO L226 Difference]: Without dead ends: 105 [2025-01-09 17:23:08,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2025-01-09 17:23:08,960 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:08,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1212 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-09 17:23:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-01-09 17:23:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2025-01-09 17:23:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 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) [2025-01-09 17:23:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2025-01-09 17:23:08,973 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 55 [2025-01-09 17:23:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:08,973 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2025-01-09 17:23:08,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2025-01-09 17:23:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2025-01-09 17:23:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-01-09 17:23:08,974 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:08,974 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] [2025-01-09 17:23:08,984 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 [2025-01-09 17:23:09,179 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 [2025-01-09 17:23:09,179 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:09,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -542163063, now seen corresponding path program 1 times [2025-01-09 17:23:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:09,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952403850] [2025-01-09 17:23:09,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:09,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-01-09 17:23:09,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-01-09 17:23:09,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:09,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-01-09 17:23:09,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952403850] [2025-01-09 17:23:09,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952403850] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843828385] [2025-01-09 17:23:09,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:09,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:09,552 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) [2025-01-09 17:23:09,554 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 [2025-01-09 17:23:09,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-01-09 17:23:09,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-01-09 17:23:09,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:09,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:09,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-01-09 17:23:09,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:09,864 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 [2025-01-09 17:23:09,892 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 [2025-01-09 17:23:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 17:23:10,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:10,999 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 [2025-01-09 17:23:11,004 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 [2025-01-09 17:23:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843828385] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:11,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 12] total 31 [2025-01-09 17:23:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723579247] [2025-01-09 17:23:11,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:11,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-09 17:23:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:11,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-09 17:23:11,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2025-01-09 17:23:11,092 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 31 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2025-01-09 17:23:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:12,653 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2025-01-09 17:23:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-09 17:23:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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 [2025-01-09 17:23:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:12,657 INFO L225 Difference]: With dead ends: 163 [2025-01-09 17:23:12,657 INFO L226 Difference]: Without dead ends: 103 [2025-01-09 17:23:12,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2025-01-09 17:23:12,662 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:12,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1292 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-09 17:23:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-01-09 17:23:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2025-01-09 17:23:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 69 states have internal predecessors, (82), 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) [2025-01-09 17:23:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2025-01-09 17:23:12,676 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 58 [2025-01-09 17:23:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:12,676 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2025-01-09 17:23:12,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 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) [2025-01-09 17:23:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2025-01-09 17:23:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-01-09 17:23:12,677 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:12,677 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] [2025-01-09 17:23:12,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 17:23:12,883 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 [2025-01-09 17:23:12,883 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:12,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1998345087, now seen corresponding path program 2 times [2025-01-09 17:23:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:12,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296612447] [2025-01-09 17:23:12,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 17:23:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:12,913 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-01-09 17:23:12,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-01-09 17:23:12,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 17:23:12,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-09 17:23:13,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296612447] [2025-01-09 17:23:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296612447] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588361138] [2025-01-09 17:23:13,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 17:23:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:13,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:13,234 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) [2025-01-09 17:23:13,236 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 [2025-01-09 17:23:13,376 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-01-09 17:23:13,484 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 61 of 61 statements. [2025-01-09 17:23:13,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 17:23:13,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:13,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-01-09 17:23:13,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:13,598 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 [2025-01-09 17:23:13,624 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 [2025-01-09 17:23:13,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:13,675 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 [2025-01-09 17:23:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:13,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588361138] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:14,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 17:23:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 18 [2025-01-09 17:23:14,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436083607] [2025-01-09 17:23:14,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:14,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 17:23:14,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:14,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 17:23:14,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2025-01-09 17:23:14,029 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 18 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 5 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-01-09 17:23:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:14,546 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2025-01-09 17:23:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 17:23:14,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 5 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 61 [2025-01-09 17:23:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:14,548 INFO L225 Difference]: With dead ends: 164 [2025-01-09 17:23:14,548 INFO L226 Difference]: Without dead ends: 104 [2025-01-09 17:23:14,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2025-01-09 17:23:14,549 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 95 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:14,550 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 624 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 17:23:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-01-09 17:23:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2025-01-09 17:23:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 70 states have internal predecessors, (83), 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) [2025-01-09 17:23:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2025-01-09 17:23:14,563 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 61 [2025-01-09 17:23:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:14,564 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2025-01-09 17:23:14,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 17 states have internal predecessors, (54), 5 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-01-09 17:23:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2025-01-09 17:23:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-01-09 17:23:14,564 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:14,564 INFO L218 NwaCegarLoop]: trace histogram [4, 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] [2025-01-09 17:23:14,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 17:23:14,765 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 [2025-01-09 17:23:14,765 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:14,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1944427955, now seen corresponding path program 3 times [2025-01-09 17:23:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:14,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398982978] [2025-01-09 17:23:14,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 17:23:14,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:14,796 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 3 equivalence classes. [2025-01-09 17:23:14,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 62 of 62 statements. [2025-01-09 17:23:14,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 17:23:14,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-09 17:23:15,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:15,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398982978] [2025-01-09 17:23:15,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398982978] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:15,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832152058] [2025-01-09 17:23:15,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 17:23:15,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:15,227 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) [2025-01-09 17:23:15,229 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 [2025-01-09 17:23:15,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 3 equivalence classes. [2025-01-09 17:23:15,769 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 62 of 62 statements. [2025-01-09 17:23:15,769 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 17:23:15,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:15,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-01-09 17:23:15,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:15,887 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 [2025-01-09 17:23:15,912 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 [2025-01-09 17:23:15,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:15,951 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 [2025-01-09 17:23:15,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:15,994 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 [2025-01-09 17:23:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:16,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:17,145 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 16 treesize of output 14 [2025-01-09 17:23:17,150 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 18 treesize of output 14 [2025-01-09 17:23:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832152058] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:17,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 17] total 35 [2025-01-09 17:23:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481358750] [2025-01-09 17:23:17,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:17,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 17:23:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:17,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 17:23:17,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 17:23:17,227 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 35 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 7 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2025-01-09 17:23:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:18,967 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2025-01-09 17:23:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 17:23:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 7 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 62 [2025-01-09 17:23:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:18,970 INFO L225 Difference]: With dead ends: 176 [2025-01-09 17:23:18,970 INFO L226 Difference]: Without dead ends: 116 [2025-01-09 17:23:18,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=348, Invalid=3192, Unknown=0, NotChecked=0, Total=3540 [2025-01-09 17:23:18,971 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:18,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1237 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-09 17:23:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-01-09 17:23:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2025-01-09 17:23:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 73 states have internal predecessors, (88), 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) [2025-01-09 17:23:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2025-01-09 17:23:18,990 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 62 [2025-01-09 17:23:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:18,991 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2025-01-09 17:23:18,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 7 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2025-01-09 17:23:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2025-01-09 17:23:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-01-09 17:23:18,993 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:18,993 INFO L218 NwaCegarLoop]: trace histogram [5, 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, 1] [2025-01-09 17:23:19,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 17:23:19,194 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 [2025-01-09 17:23:19,194 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:19,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash -590224597, now seen corresponding path program 1 times [2025-01-09 17:23:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756398641] [2025-01-09 17:23:19,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:19,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-01-09 17:23:19,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 17:23:19,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:19,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:19,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756398641] [2025-01-09 17:23:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756398641] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182405695] [2025-01-09 17:23:19,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:19,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:19,582 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) [2025-01-09 17:23:19,585 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 [2025-01-09 17:23:19,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-01-09 17:23:19,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-01-09 17:23:19,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:19,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:19,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 17:23:19,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 17:23:19,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-01-09 17:23:19,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182405695] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:19,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 17:23:19,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 14 [2025-01-09 17:23:19,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77989559] [2025-01-09 17:23:19,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:23:19,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 17:23:19,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:19,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 17:23:19,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-01-09 17:23:19,955 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-01-09 17:23:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:19,993 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2025-01-09 17:23:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 17:23:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2025-01-09 17:23:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:19,996 INFO L225 Difference]: With dead ends: 148 [2025-01-09 17:23:19,996 INFO L226 Difference]: Without dead ends: 103 [2025-01-09 17:23:19,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-01-09 17:23:19,997 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:19,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 240 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:23:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-01-09 17:23:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2025-01-09 17:23:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 73 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) [2025-01-09 17:23:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2025-01-09 17:23:20,017 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 66 [2025-01-09 17:23:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:20,018 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2025-01-09 17:23:20,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-01-09 17:23:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2025-01-09 17:23:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-01-09 17:23:20,019 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:20,019 INFO L218 NwaCegarLoop]: trace histogram [5, 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] [2025-01-09 17:23:20,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 17:23:20,219 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 [2025-01-09 17:23:20,219 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:20,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1535691843, now seen corresponding path program 4 times [2025-01-09 17:23:20,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:20,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949028843] [2025-01-09 17:23:20,221 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 17:23:20,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:20,253 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-01-09 17:23:20,315 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-01-09 17:23:20,315 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 17:23:20,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 17:23:20,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:20,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949028843] [2025-01-09 17:23:20,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949028843] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:20,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710338704] [2025-01-09 17:23:20,601 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 17:23:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:20,603 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) [2025-01-09 17:23:20,606 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 [2025-01-09 17:23:20,772 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-01-09 17:23:20,909 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-01-09 17:23:20,910 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 17:23:20,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:20,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-01-09 17:23:20,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:21,067 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 13 treesize of output 9 [2025-01-09 17:23:21,101 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 23 treesize of output 22 [2025-01-09 17:23:21,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:21,150 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 32 treesize of output 34 [2025-01-09 17:23:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 17:23:21,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:22,642 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 28 treesize of output 26 [2025-01-09 17:23:22,645 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 36 treesize of output 32 [2025-01-09 17:23:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 17:23:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710338704] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:22,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 17] total 44 [2025-01-09 17:23:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640011941] [2025-01-09 17:23:22,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:22,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-09 17:23:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:22,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-09 17:23:22,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2025-01-09 17:23:22,856 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 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) [2025-01-09 17:23:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:24,696 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2025-01-09 17:23:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-09 17:23:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 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 65 [2025-01-09 17:23:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:24,698 INFO L225 Difference]: With dead ends: 176 [2025-01-09 17:23:24,698 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 17:23:24,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=372, Invalid=4458, Unknown=0, NotChecked=0, Total=4830 [2025-01-09 17:23:24,699 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 144 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:24,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1689 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-09 17:23:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 17:23:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2025-01-09 17:23:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 76 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) [2025-01-09 17:23:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2025-01-09 17:23:24,715 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 65 [2025-01-09 17:23:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:24,715 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2025-01-09 17:23:24,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 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) [2025-01-09 17:23:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2025-01-09 17:23:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-01-09 17:23:24,716 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:24,716 INFO L218 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1] [2025-01-09 17:23:24,727 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 [2025-01-09 17:23:24,916 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 [2025-01-09 17:23:24,917 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:24,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2129067239, now seen corresponding path program 1 times [2025-01-09 17:23:24,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:24,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886523723] [2025-01-09 17:23:24,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:24,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:24,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-01-09 17:23:24,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 17:23:24,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:24,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-01-09 17:23:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:25,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886523723] [2025-01-09 17:23:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886523723] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981816736] [2025-01-09 17:23:25,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:23:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:25,312 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) [2025-01-09 17:23:25,315 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 [2025-01-09 17:23:25,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-01-09 17:23:25,588 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 17:23:25,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:23:25,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:25,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 17:23:25,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-01-09 17:23:25,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-01-09 17:23:25,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981816736] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:25,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:25,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 18 [2025-01-09 17:23:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120036161] [2025-01-09 17:23:25,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:25,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 17:23:25,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:25,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 17:23:25,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-01-09 17:23:25,923 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2025-01-09 17:23:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:23:26,215 INFO L93 Difference]: Finished difference Result 175 states and 215 transitions. [2025-01-09 17:23:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 17:23:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 69 [2025-01-09 17:23:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:23:26,217 INFO L225 Difference]: With dead ends: 175 [2025-01-09 17:23:26,217 INFO L226 Difference]: Without dead ends: 107 [2025-01-09 17:23:26,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2025-01-09 17:23:26,218 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 17:23:26,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 686 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 17:23:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-01-09 17:23:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2025-01-09 17:23:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 77 states have internal predecessors, (89), 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) [2025-01-09 17:23:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2025-01-09 17:23:26,242 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 69 [2025-01-09 17:23:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:23:26,243 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2025-01-09 17:23:26,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2025-01-09 17:23:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2025-01-09 17:23:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-01-09 17:23:26,243 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:23:26,244 INFO L218 NwaCegarLoop]: trace histogram [7, 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] [2025-01-09 17:23:26,255 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 [2025-01-09 17:23:26,444 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 [2025-01-09 17:23:26,444 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:23:26,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:23:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1096697, now seen corresponding path program 5 times [2025-01-09 17:23:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:23:26,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333650600] [2025-01-09 17:23:26,445 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 17:23:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:23:26,482 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 69 statements into 5 equivalence classes. [2025-01-09 17:23:26,641 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 17:23:26,642 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-09 17:23:26,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 1 times theorem prover too weak. 32 trivial. 0 not checked. [2025-01-09 17:23:32,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:23:32,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333650600] [2025-01-09 17:23:32,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333650600] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:23:32,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999187957] [2025-01-09 17:23:32,586 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 17:23:32,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:23:32,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:23:32,588 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) [2025-01-09 17:23:32,591 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 [2025-01-09 17:23:32,796 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 69 statements into 5 equivalence classes. [2025-01-09 17:23:33,551 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 17:23:33,552 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-09 17:23:33,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:23:33,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-01-09 17:23:33,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:23:33,688 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 [2025-01-09 17:23:33,713 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 [2025-01-09 17:23:33,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:33,745 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 [2025-01-09 17:23:33,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:33,784 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 [2025-01-09 17:23:33,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:33,843 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 [2025-01-09 17:23:33,943 INFO L349 Elim1Store]: treesize reduction 88, result has 33.3 percent of original size [2025-01-09 17:23:33,944 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 15 case distinctions, treesize of input 57 treesize of output 68 [2025-01-09 17:23:34,109 INFO L349 Elim1Store]: treesize reduction 146, result has 26.6 percent of original size [2025-01-09 17:23:34,109 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 21 case distinctions, treesize of input 66 treesize of output 80 [2025-01-09 17:23:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 17:23:47,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:48,800 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 44 treesize of output 42 [2025-01-09 17:23:49,373 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 40 treesize of output 38 [2025-01-09 17:23:49,375 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 54 treesize of output 50 [2025-01-09 17:23:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 17:23:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999187957] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:49,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:49,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 26, 18] total 50 [2025-01-09 17:23:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885020811] [2025-01-09 17:23:49,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:49,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-01-09 17:23:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:49,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-01-09 17:23:49,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2276, Unknown=4, NotChecked=0, Total=2450 [2025-01-09 17:23:49,455 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 50 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 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) [2025-01-09 17:23:58,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-09 17:24:24,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]