./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_front_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_front_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 d60183102582204ad3b2c5c2967c5e39411556c79eb47cc4f179f5b1b7f07a77 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 17:20:29,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 17:20:29,717 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-01-09 17:20:29,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 17:20:29,726 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 17:20:29,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 17:20:29,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 17:20:29,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 17:20:29,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 17:20:29,746 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 17:20:29,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 17:20:29,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 17:20:29,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 17:20:29,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 17:20:29,747 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 17:20:29,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 17:20:29,748 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 17:20:29,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:20:29,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:20:29,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 17:20:29,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 17:20:29,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 17:20:29,750 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 -> d60183102582204ad3b2c5c2967c5e39411556c79eb47cc4f179f5b1b7f07a77 [2025-01-09 17:20:29,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 17:20:29,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 17:20:29,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 17:20:29,968 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 17:20:29,969 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 17:20:29,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2025-01-09 17:20:31,235 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b3fa567f5/9ddd8dd9dce14529a2dad2d7819b3c1f/FLAGfc3bffe10 [2025-01-09 17:20:31,669 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 17:20:31,669 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2025-01-09 17:20:31,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b3fa567f5/9ddd8dd9dce14529a2dad2d7819b3c1f/FLAGfc3bffe10 [2025-01-09 17:20:31,795 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b3fa567f5/9ddd8dd9dce14529a2dad2d7819b3c1f [2025-01-09 17:20:31,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 17:20:31,798 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 17:20:31,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 17:20:31,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 17:20:31,803 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 17:20:31,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 05:20:31" (1/1) ... [2025-01-09 17:20:31,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ccf8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:31, skipping insertion in model container [2025-01-09 17:20:31,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 05:20:31" (1/1) ... [2025-01-09 17:20:31,866 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 17:20:32,046 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_front_harness.i[4495,4508] [2025-01-09 17:20:32,053 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_front_harness.i[4555,4568] [2025-01-09 17:20:32,522 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,522 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,523 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,523 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,524 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,533 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,534 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,535 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,535 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,540 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,540 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,541 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,541 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,875 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_front_harness.i[150660,150673] [2025-01-09 17:20:32,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 17:20:32,896 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 17:20:32,907 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_front_harness.i[4495,4508] [2025-01-09 17:20:32,907 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_front_harness.i[4555,4568] [2025-01-09 17:20:32,956 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,958 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,960 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,960 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,961 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,971 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,975 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,976 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,976 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,977 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:32,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:20:33,055 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_front_harness.i[150660,150673] [2025-01-09 17:20:33,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 17:20:33,182 INFO L204 MainTranslator]: Completed translation [2025-01-09 17:20:33,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33 WrapperNode [2025-01-09 17:20:33,183 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 17:20:33,184 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 17:20:33,184 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 17:20:33,184 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 17:20:33,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,266 INFO L138 Inliner]: procedures = 668, calls = 1043, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 129 [2025-01-09 17:20:33,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 17:20:33,267 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 17:20:33,267 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 17:20:33,267 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 17:20:33,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,298 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 5, 20]. 74 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 6 writes are split as follows [0, 0, 6]. [2025-01-09 17:20:33,298 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,316 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 17:20:33,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 17:20:33,331 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 17:20:33,331 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 17:20:33,332 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (1/1) ... [2025-01-09 17:20:33,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:20:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:33,359 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 17:20:33,361 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 17:20:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 17:20:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 17:20:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 17:20:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2025-01-09 17:20:33,376 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2025-01-09 17:20:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 17:20:33,376 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2025-01-09 17:20:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2025-01-09 17:20:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 17:20:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2025-01-09 17:20:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 17:20:33,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 17:20:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2025-01-09 17:20:33,378 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2025-01-09 17:20:33,378 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 17:20:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 17:20:33,542 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 17:20:33,544 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 17:20:33,735 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2025-01-09 17:20:33,735 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 17:20:33,742 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 17:20:33,742 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 17:20:33,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 05:20:33 BoogieIcfgContainer [2025-01-09 17:20:33,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 17:20:33,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 17:20:33,744 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 17:20:33,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 17:20:33,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 05:20:31" (1/3) ... [2025-01-09 17:20:33,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa015a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 05:20:33, skipping insertion in model container [2025-01-09 17:20:33,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:20:33" (2/3) ... [2025-01-09 17:20:33,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa015a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 05:20:33, skipping insertion in model container [2025-01-09 17:20:33,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 05:20:33" (3/3) ... [2025-01-09 17:20:33,749 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2025-01-09 17:20:33,759 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 17:20:33,761 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_front_harness.i that has 9 procedures, 96 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 17:20:33,795 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 17:20:33,807 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;@419bbcaa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 17:20:33,807 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 17:20:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 63 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-01-09 17:20:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-01-09 17:20:33,816 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:33,817 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:20:33,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:33,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:33,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1255639806, now seen corresponding path program 1 times [2025-01-09 17:20:33,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:33,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856113490] [2025-01-09 17:20:33,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:33,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-01-09 17:20:33,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-01-09 17:20:33,941 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:33,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-09 17:20:34,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:34,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856113490] [2025-01-09 17:20:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856113490] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:34,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818111645] [2025-01-09 17:20:34,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:34,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:34,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:34,155 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 17:20:34,156 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 17:20:34,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-01-09 17:20:34,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-01-09 17:20:34,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:34,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:34,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 17:20:34,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:20:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-01-09 17:20:34,372 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:20:34,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818111645] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:20:34,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:20:34,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 17:20:34,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287932559] [2025-01-09 17:20:34,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:20:34,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 17:20:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:20:34,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 17:20:34,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 17:20:34,396 INFO L87 Difference]: Start difference. First operand has 96 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 63 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-01-09 17:20:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:20:34,421 INFO L93 Difference]: Finished difference Result 184 states and 260 transitions. [2025-01-09 17:20:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 17:20:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2025-01-09 17:20:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:20:34,427 INFO L225 Difference]: With dead ends: 184 [2025-01-09 17:20:34,428 INFO L226 Difference]: Without dead ends: 91 [2025-01-09 17:20:34,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 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 17:20:34,432 INFO L435 NwaCegarLoop]: 125 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, 125 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 17:20:34,433 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:20:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-09 17:20:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-01-09 17:20:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 59 states have internal predecessors, (73), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2025-01-09 17:20:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2025-01-09 17:20:34,463 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 83 [2025-01-09 17:20:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:20:34,465 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2025-01-09 17:20:34,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-01-09 17:20:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2025-01-09 17:20:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-01-09 17:20:34,469 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:34,469 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:20:34,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 17:20:34,670 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 17:20:34,670 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:34,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2103623434, now seen corresponding path program 1 times [2025-01-09 17:20:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:34,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785688178] [2025-01-09 17:20:34,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:34,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:34,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-01-09 17:20:34,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-01-09 17:20:34,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:34,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-01-09 17:20:35,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785688178] [2025-01-09 17:20:35,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785688178] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712299180] [2025-01-09 17:20:35,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:35,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:35,277 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 17:20:35,278 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 17:20:35,374 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-01-09 17:20:35,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-01-09 17:20:35,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:35,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:35,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-01-09 17:20:35,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:20:35,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2025-01-09 17:20:35,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2025-01-09 17:20:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-01-09 17:20:36,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:20:49,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2025-01-09 17:20:49,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:49,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:20:49,629 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2025-01-09 17:20:49,637 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 17:20:49,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2025-01-09 17:20:49,640 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 6 treesize of output 4 [2025-01-09 17:20:49,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 17:20:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-01-09 17:20:49,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712299180] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:49,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 17:20:49,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 17] total 34 [2025-01-09 17:20:49,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366873365] [2025-01-09 17:20:49,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:20:49,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 17:20:49,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:20:49,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 17:20:49,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1012, Unknown=3, NotChecked=0, Total=1122 [2025-01-09 17:20:49,730 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-01-09 17:20:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:20:50,039 INFO L93 Difference]: Finished difference Result 164 states and 222 transitions. [2025-01-09 17:20:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 17:20:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 83 [2025-01-09 17:20:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:20:50,040 INFO L225 Difference]: With dead ends: 164 [2025-01-09 17:20:50,040 INFO L226 Difference]: Without dead ends: 92 [2025-01-09 17:20:50,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 130 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=117, Invalid=1140, Unknown=3, NotChecked=0, Total=1260 [2025-01-09 17:20:50,042 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 4 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:20:50,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1060 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:20:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-01-09 17:20:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2025-01-09 17:20:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 60 states have internal predecessors, (74), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2025-01-09 17:20:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2025-01-09 17:20:50,049 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 83 [2025-01-09 17:20:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:20:50,050 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2025-01-09 17:20:50,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 7 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-01-09 17:20:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2025-01-09 17:20:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-01-09 17:20:50,051 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:50,051 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:20:50,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 17:20:50,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:50,256 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:50,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:50,257 INFO L85 PathProgramCache]: Analyzing trace with hash -182656141, now seen corresponding path program 1 times [2025-01-09 17:20:50,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:50,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961942172] [2025-01-09 17:20:50,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:50,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:50,273 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-01-09 17:20:50,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-01-09 17:20:50,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:50,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 17:20:50,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:50,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961942172] [2025-01-09 17:20:50,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961942172] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:50,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530977974] [2025-01-09 17:20:50,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:50,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:50,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:50,578 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 17:20:50,581 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 17:20:50,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-01-09 17:20:50,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-01-09 17:20:50,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:50,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:50,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-09 17:20:50,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:20:50,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-01-09 17:20:50,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2025-01-09 17:20:50,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2025-01-09 17:20:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:50,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2025-01-09 17:20:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:50,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:50,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2025-01-09 17:20:50,902 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-09 17:20:50,902 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 1 case distinctions, treesize of input 27 treesize of output 24 [2025-01-09 17:20:50,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 17:20:50,927 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-09 17:20:50,927 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 1 case distinctions, treesize of input 34 treesize of output 29 [2025-01-09 17:20:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:50,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2025-01-09 17:20:50,977 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-09 17:20:50,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-09 17:20:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:51,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 87 [2025-01-09 17:20:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:20:51,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2025-01-09 17:20:51,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 25 [2025-01-09 17:20:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 17:20:51,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:20:51,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:20:51,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2025-01-09 17:20:52,024 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 17:20:52,025 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 17:20:52,075 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2025-01-09 17:20:52,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 286 [2025-01-09 17:20:52,084 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 17:20:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 17:20:52,143 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2025-01-09 17:20:52,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 232 [2025-01-09 17:20:52,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:20:52,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 260 [2025-01-09 17:20:52,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:20:52,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 294 [2025-01-09 17:20:52,183 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 253 treesize of output 241 [2025-01-09 17:20:52,201 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 265 treesize of output 253 [2025-01-09 17:20:52,269 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 8 treesize of output 4 [2025-01-09 17:20:53,107 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 8 treesize of output 4 [2025-01-09 17:20:53,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:20:53,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 526 treesize of output 512 [2025-01-09 17:20:54,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:20:54,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 693 treesize of output 631 [2025-01-09 17:20:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530977974] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:55,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 17:20:55,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2025-01-09 17:20:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799770773] [2025-01-09 17:20:55,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 17:20:55,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 17:20:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:20:55,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 17:20:55,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=556, Unknown=16, NotChecked=0, Total=650 [2025-01-09 17:20:55,604 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2025-01-09 17:20:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:20:56,820 INFO L93 Difference]: Finished difference Result 258 states and 350 transitions. [2025-01-09 17:20:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-09 17:20:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 84 [2025-01-09 17:20:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:20:56,825 INFO L225 Difference]: With dead ends: 258 [2025-01-09 17:20:56,825 INFO L226 Difference]: Without dead ends: 180 [2025-01-09 17:20:56,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=217, Invalid=1568, Unknown=21, NotChecked=0, Total=1806 [2025-01-09 17:20:56,830 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 241 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 17:20:56,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 870 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 17:20:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-01-09 17:20:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2025-01-09 17:20:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 113 states have (on average 1.2654867256637168) internal successors, (143), 117 states have internal predecessors, (143), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-01-09 17:20:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2025-01-09 17:20:56,855 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 84 [2025-01-09 17:20:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:20:56,856 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2025-01-09 17:20:56,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (24), 5 states have call predecessors, (24), 7 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2025-01-09 17:20:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2025-01-09 17:20:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-01-09 17:20:56,858 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:56,859 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:20:56,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 17:20:57,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:57,059 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:57,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1763276307, now seen corresponding path program 1 times [2025-01-09 17:20:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:57,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495379007] [2025-01-09 17:20:57,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:57,078 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-01-09 17:20:57,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 17:20:57,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:57,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-01-09 17:20:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495379007] [2025-01-09 17:20:57,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495379007] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729534668] [2025-01-09 17:20:57,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:57,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:57,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:57,255 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 17:20:57,258 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 17:20:57,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-01-09 17:20:57,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 17:20:57,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:57,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:57,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 17:20:57,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:20:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 17:20:57,520 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:20:57,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729534668] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:20:57,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:20:57,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2025-01-09 17:20:57,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464327212] [2025-01-09 17:20:57,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:20:57,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 17:20:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:20:57,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 17:20:57,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2025-01-09 17:20:57,525 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 17:20:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:20:57,830 INFO L93 Difference]: Finished difference Result 338 states and 453 transitions. [2025-01-09 17:20:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 17:20:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2025-01-09 17:20:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:20:57,832 INFO L225 Difference]: With dead ends: 338 [2025-01-09 17:20:57,834 INFO L226 Difference]: Without dead ends: 181 [2025-01-09 17:20:57,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2025-01-09 17:20:57,835 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 130 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:20:57,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 554 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:20:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-01-09 17:20:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2025-01-09 17:20:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 113 states have (on average 1.247787610619469) internal successors, (141), 117 states have internal predecessors, (141), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-01-09 17:20:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 235 transitions. [2025-01-09 17:20:57,859 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 235 transitions. Word has length 86 [2025-01-09 17:20:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:20:57,859 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 235 transitions. [2025-01-09 17:20:57,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 17:20:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 235 transitions. [2025-01-09 17:20:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-01-09 17:20:57,862 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:57,862 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:20:57,872 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 17:20:58,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:58,068 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:58,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1101743799, now seen corresponding path program 1 times [2025-01-09 17:20:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710343822] [2025-01-09 17:20:58,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:58,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:58,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-01-09 17:20:58,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-01-09 17:20:58,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:58,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-01-09 17:20:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:58,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710343822] [2025-01-09 17:20:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710343822] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300814329] [2025-01-09 17:20:58,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:58,280 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 17:20:58,282 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 17:20:58,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-01-09 17:20:58,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-01-09 17:20:58,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:58,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:58,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 17:20:58,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:20:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 17:20:58,535 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:20:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300814329] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:20:58,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:20:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2025-01-09 17:20:58,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203185708] [2025-01-09 17:20:58,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:20:58,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 17:20:58,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:20:58,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 17:20:58,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2025-01-09 17:20:58,537 INFO L87 Difference]: Start difference. First operand 177 states and 235 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 17:20:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:20:58,784 INFO L93 Difference]: Finished difference Result 350 states and 469 transitions. [2025-01-09 17:20:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 17:20:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2025-01-09 17:20:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:20:58,786 INFO L225 Difference]: With dead ends: 350 [2025-01-09 17:20:58,786 INFO L226 Difference]: Without dead ends: 191 [2025-01-09 17:20:58,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2025-01-09 17:20:58,787 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 144 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:20:58,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 616 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:20:58,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-01-09 17:20:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2025-01-09 17:20:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 119 states have internal predecessors, (143), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-01-09 17:20:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 237 transitions. [2025-01-09 17:20:58,801 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 237 transitions. Word has length 88 [2025-01-09 17:20:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:20:58,801 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 237 transitions. [2025-01-09 17:20:58,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 17:20:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 237 transitions. [2025-01-09 17:20:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-01-09 17:20:58,802 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:58,803 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:20:58,809 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 17:20:59,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:59,004 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:59,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1416856317, now seen corresponding path program 1 times [2025-01-09 17:20:59,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:59,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218393076] [2025-01-09 17:20:59,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:59,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:59,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-01-09 17:20:59,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-01-09 17:20:59,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:59,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2025-01-09 17:20:59,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218393076] [2025-01-09 17:20:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218393076] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815864607] [2025-01-09 17:20:59,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:59,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:59,210 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 17:20:59,212 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 17:20:59,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-01-09 17:20:59,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-01-09 17:20:59,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:59,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:59,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-01-09 17:20:59,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:20:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-01-09 17:20:59,350 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:20:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815864607] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:20:59,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:20:59,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2025-01-09 17:20:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437130240] [2025-01-09 17:20:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:20:59,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 17:20:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:20:59,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 17:20:59,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-01-09 17:20:59,351 INFO L87 Difference]: Start difference. First operand 179 states and 237 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2025-01-09 17:20:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:20:59,370 INFO L93 Difference]: Finished difference Result 340 states and 459 transitions. [2025-01-09 17:20:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 17:20:59,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 89 [2025-01-09 17:20:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:20:59,371 INFO L225 Difference]: With dead ends: 340 [2025-01-09 17:20:59,371 INFO L226 Difference]: Without dead ends: 187 [2025-01-09 17:20:59,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-01-09 17:20:59,372 INFO L435 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:20:59,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 227 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:20:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2025-01-09 17:20:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2025-01-09 17:20:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 121 states have internal predecessors, (145), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-01-09 17:20:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2025-01-09 17:20:59,385 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 89 [2025-01-09 17:20:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:20:59,385 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2025-01-09 17:20:59,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2025-01-09 17:20:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2025-01-09 17:20:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-01-09 17:20:59,386 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:20:59,386 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:20:59,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 17:20:59,587 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,SelfDestructingSolverStorable5 [2025-01-09 17:20:59,587 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:20:59,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:20:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2092208005, now seen corresponding path program 1 times [2025-01-09 17:20:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:20:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985006816] [2025-01-09 17:20:59,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:20:59,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-01-09 17:20:59,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-01-09 17:20:59,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:20:59,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:20:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 17:20:59,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:20:59,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985006816] [2025-01-09 17:20:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985006816] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:20:59,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216253161] [2025-01-09 17:20:59,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:20:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:20:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:20:59,937 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 17:20:59,938 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 17:21:00,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-01-09 17:21:00,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-01-09 17:21:00,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:00,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:00,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 17:21:00,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:21:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-01-09 17:21:00,224 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:21:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216253161] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:21:00,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:21:00,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 15 [2025-01-09 17:21:00,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954856031] [2025-01-09 17:21:00,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:21:00,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 17:21:00,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:21:00,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 17:21:00,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2025-01-09 17:21:00,225 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-01-09 17:21:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:21:00,513 INFO L93 Difference]: Finished difference Result 342 states and 453 transitions. [2025-01-09 17:21:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 17:21:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 97 [2025-01-09 17:21:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:21:00,515 INFO L225 Difference]: With dead ends: 342 [2025-01-09 17:21:00,515 INFO L226 Difference]: Without dead ends: 187 [2025-01-09 17:21:00,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2025-01-09 17:21:00,516 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 106 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:21:00,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 928 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:21:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2025-01-09 17:21:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2025-01-09 17:21:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 119 states have (on average 1.2352941176470589) internal successors, (147), 123 states have internal predecessors, (147), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-01-09 17:21:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 241 transitions. [2025-01-09 17:21:00,533 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 241 transitions. Word has length 97 [2025-01-09 17:21:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:21:00,533 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 241 transitions. [2025-01-09 17:21:00,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-01-09 17:21:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 241 transitions. [2025-01-09 17:21:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-01-09 17:21:00,534 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:21:00,534 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:21:00,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 17:21:00,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:00,739 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:21:00,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:21:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1756870881, now seen corresponding path program 1 times [2025-01-09 17:21:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:21:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451367734] [2025-01-09 17:21:00,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:21:00,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-01-09 17:21:00,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-01-09 17:21:00,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:00,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-01-09 17:21:01,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:21:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451367734] [2025-01-09 17:21:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451367734] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:21:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727806764] [2025-01-09 17:21:01,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:01,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:01,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:21:01,082 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 17:21:01,084 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 17:21:01,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-01-09 17:21:01,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-01-09 17:21:01,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:01,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:01,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-09 17:21:01,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:21:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-09 17:21:01,413 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:21:01,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727806764] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:21:01,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:21:01,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2025-01-09 17:21:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468555022] [2025-01-09 17:21:01,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:21:01,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 17:21:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:21:01,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 17:21:01,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2025-01-09 17:21:01,415 INFO L87 Difference]: Start difference. First operand 183 states and 241 transitions. Second operand has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2025-01-09 17:21:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:21:01,692 INFO L93 Difference]: Finished difference Result 348 states and 459 transitions. [2025-01-09 17:21:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 17:21:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 99 [2025-01-09 17:21:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:21:01,695 INFO L225 Difference]: With dead ends: 348 [2025-01-09 17:21:01,695 INFO L226 Difference]: Without dead ends: 191 [2025-01-09 17:21:01,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2025-01-09 17:21:01,696 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 111 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:21:01,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 753 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:21:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-01-09 17:21:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2025-01-09 17:21:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 125 states have internal predecessors, (149), 46 states have call successors, (46), 15 states have call predecessors, (46), 17 states have return successors, (48), 44 states have call predecessors, (48), 44 states have call successors, (48) [2025-01-09 17:21:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 243 transitions. [2025-01-09 17:21:01,714 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 243 transitions. Word has length 99 [2025-01-09 17:21:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:21:01,715 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 243 transitions. [2025-01-09 17:21:01,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2025-01-09 17:21:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 243 transitions. [2025-01-09 17:21:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-01-09 17:21:01,717 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:21:01,717 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:21:01,724 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 17:21:01,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:01,918 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:21:01,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:21:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1300852843, now seen corresponding path program 1 times [2025-01-09 17:21:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:21:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265179858] [2025-01-09 17:21:01,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:01,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:21:01,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 100 statements into 1 equivalence classes. [2025-01-09 17:21:01,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 100 of 100 statements. [2025-01-09 17:21:01,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:01,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2025-01-09 17:21:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:21:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265179858] [2025-01-09 17:21:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265179858] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:21:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806248186] [2025-01-09 17:21:02,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:02,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:21:02,582 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 17:21:02,583 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 17:21:02,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 100 statements into 1 equivalence classes. [2025-01-09 17:21:02,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 100 of 100 statements. [2025-01-09 17:21:02,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:02,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:02,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-01-09 17:21:02,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:21:02,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-01-09 17:21:02,835 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-09 17:21:02,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-09 17:21:02,841 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-01-09 17:21:02,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-09 17:21:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:21:02,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 23 [2025-01-09 17:21:02,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2025-01-09 17:21:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 17:21:03,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:21:03,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:21:03,588 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2025-01-09 17:21:03,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:21:03,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 171 treesize of output 185 [2025-01-09 17:21:03,605 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 184 treesize of output 176 [2025-01-09 17:21:03,647 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 6 treesize of output 4 [2025-01-09 17:21:03,670 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 8 treesize of output 6 [2025-01-09 17:21:03,675 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 8 treesize of output 6 [2025-01-09 17:21:03,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:21:03,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2025-01-09 17:21:03,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:21:03,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 59 [2025-01-09 17:21:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806248186] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:21:03,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 17:21:03,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2025-01-09 17:21:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708405938] [2025-01-09 17:21:03,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 17:21:03,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 17:21:03,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:21:03,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 17:21:03,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1134, Unknown=15, NotChecked=0, Total=1260 [2025-01-09 17:21:03,902 INFO L87 Difference]: Start difference. First operand 185 states and 243 transitions. Second operand has 25 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2025-01-09 17:21:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:21:04,989 INFO L93 Difference]: Finished difference Result 376 states and 500 transitions. [2025-01-09 17:21:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 17:21:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 100 [2025-01-09 17:21:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:21:04,991 INFO L225 Difference]: With dead ends: 376 [2025-01-09 17:21:04,991 INFO L226 Difference]: Without dead ends: 209 [2025-01-09 17:21:04,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 166 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1843, Unknown=17, NotChecked=0, Total=2070 [2025-01-09 17:21:04,993 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 197 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-09 17:21:04,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1127 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-09 17:21:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-01-09 17:21:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 197. [2025-01-09 17:21:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 130 states have (on average 1.2461538461538462) internal successors, (162), 134 states have internal predecessors, (162), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2025-01-09 17:21:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 260 transitions. [2025-01-09 17:21:05,010 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 260 transitions. Word has length 100 [2025-01-09 17:21:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:21:05,010 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 260 transitions. [2025-01-09 17:21:05,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2025-01-09 17:21:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 260 transitions. [2025-01-09 17:21:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-01-09 17:21:05,011 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:21:05,012 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:21:05,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 17:21:05,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:05,212 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:21:05,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:21:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1775121405, now seen corresponding path program 2 times [2025-01-09 17:21:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:21:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664186761] [2025-01-09 17:21:05,213 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 17:21:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:21:05,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-01-09 17:21:05,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:05,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 17:21:05,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-01-09 17:21:05,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:21:05,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664186761] [2025-01-09 17:21:05,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664186761] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:21:05,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 17:21:05,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-01-09 17:21:05,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708826088] [2025-01-09 17:21:05,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:21:05,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 17:21:05,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:21:05,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 17:21:05,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-01-09 17:21:05,698 INFO L87 Difference]: Start difference. First operand 197 states and 260 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 17:21:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:21:05,959 INFO L93 Difference]: Finished difference Result 416 states and 562 transitions. [2025-01-09 17:21:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 17:21:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 111 [2025-01-09 17:21:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:21:05,961 INFO L225 Difference]: With dead ends: 416 [2025-01-09 17:21:05,961 INFO L226 Difference]: Without dead ends: 205 [2025-01-09 17:21:05,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2025-01-09 17:21:05,963 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 57 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 17:21:05,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 689 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 17:21:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-01-09 17:21:05,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2025-01-09 17:21:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 138 states have internal predecessors, (166), 48 states have call successors, (48), 16 states have call predecessors, (48), 18 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2025-01-09 17:21:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 264 transitions. [2025-01-09 17:21:05,983 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 264 transitions. Word has length 111 [2025-01-09 17:21:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:21:05,983 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 264 transitions. [2025-01-09 17:21:05,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-01-09 17:21:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 264 transitions. [2025-01-09 17:21:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-01-09 17:21:05,985 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:21:05,985 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2025-01-09 17:21:05,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-09 17:21:05,986 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:21:05,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:21:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2126818881, now seen corresponding path program 1 times [2025-01-09 17:21:05,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:21:05,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139248074] [2025-01-09 17:21:05,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:21:06,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-01-09 17:21:06,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:06,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:06,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2025-01-09 17:21:06,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:21:06,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139248074] [2025-01-09 17:21:06,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139248074] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:21:06,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605247636] [2025-01-09 17:21:06,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:06,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:06,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:21:06,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 17:21:06,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 17:21:06,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-01-09 17:21:06,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:06,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:06,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:06,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-01-09 17:21:06,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:21:06,911 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 8 treesize of output 1 [2025-01-09 17:21:06,913 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 8 treesize of output 1 [2025-01-09 17:21:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-09 17:21:07,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:21:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-01-09 17:21:07,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605247636] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:21:07,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:21:07,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 23 [2025-01-09 17:21:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290713704] [2025-01-09 17:21:07,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:21:07,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 17:21:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:21:07,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 17:21:07,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2025-01-09 17:21:07,814 INFO L87 Difference]: Start difference. First operand 201 states and 264 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2025-01-09 17:21:11,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:21:15,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:21:20,067 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] [2025-01-09 17:21:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:21:20,759 INFO L93 Difference]: Finished difference Result 688 states and 946 transitions. [2025-01-09 17:21:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 17:21:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 111 [2025-01-09 17:21:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:21:20,764 INFO L225 Difference]: With dead ends: 688 [2025-01-09 17:21:20,764 INFO L226 Difference]: Without dead ends: 547 [2025-01-09 17:21:20,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 205 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 17:21:20,765 INFO L435 NwaCegarLoop]: 129 mSDtfsCounter, 229 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2025-01-09 17:21:20,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1084 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 739 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2025-01-09 17:21:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2025-01-09 17:21:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 421. [2025-01-09 17:21:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 293 states have (on average 1.2798634812286689) internal successors, (375), 300 states have internal predecessors, (375), 90 states have call successors, (90), 30 states have call predecessors, (90), 37 states have return successors, (109), 90 states have call predecessors, (109), 86 states have call successors, (109) [2025-01-09 17:21:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 574 transitions. [2025-01-09 17:21:20,847 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 574 transitions. Word has length 111 [2025-01-09 17:21:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:21:20,847 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 574 transitions. [2025-01-09 17:21:20,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2025-01-09 17:21:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 574 transitions. [2025-01-09 17:21:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-01-09 17:21:20,848 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:21:20,848 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2025-01-09 17:21:20,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 17:21:21,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:21,049 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:21:21,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:21:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1159468227, now seen corresponding path program 1 times [2025-01-09 17:21:21,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:21:21,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119907696] [2025-01-09 17:21:21,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:21,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:21:21,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-01-09 17:21:21,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:21,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:21,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-01-09 17:21:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:21:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119907696] [2025-01-09 17:21:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119907696] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:21:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563747419] [2025-01-09 17:21:21,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:21:21,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 17:21:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 17:21:21,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-01-09 17:21:21,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:21,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:21,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:21,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-09 17:21:21,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:21:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-01-09 17:21:21,277 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:21:21,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563747419] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:21:21,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:21:21,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2025-01-09 17:21:21,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993312155] [2025-01-09 17:21:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:21:21,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 17:21:21,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:21:21,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 17:21:21,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 17:21:21,278 INFO L87 Difference]: Start difference. First operand 421 states and 574 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-01-09 17:21:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:21:21,306 INFO L93 Difference]: Finished difference Result 608 states and 822 transitions. [2025-01-09 17:21:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 17:21:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2025-01-09 17:21:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:21:21,308 INFO L225 Difference]: With dead ends: 608 [2025-01-09 17:21:21,308 INFO L226 Difference]: Without dead ends: 260 [2025-01-09 17:21:21,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 17:21:21,310 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 1 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:21:21,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 343 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:21:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2025-01-09 17:21:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2025-01-09 17:21:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 180 states have (on average 1.2166666666666666) internal successors, (219), 183 states have internal predecessors, (219), 50 states have call successors, (50), 24 states have call predecessors, (50), 25 states have return successors, (55), 48 states have call predecessors, (55), 48 states have call successors, (55) [2025-01-09 17:21:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 324 transitions. [2025-01-09 17:21:21,333 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 324 transitions. Word has length 111 [2025-01-09 17:21:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:21:21,333 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 324 transitions. [2025-01-09 17:21:21,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-01-09 17:21:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 324 transitions. [2025-01-09 17:21:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-01-09 17:21:21,334 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:21:21,335 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2025-01-09 17:21:21,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 17:21:21,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 17:21:21,535 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:21:21,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:21:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1909982977, now seen corresponding path program 1 times [2025-01-09 17:21:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:21:21,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932762889] [2025-01-09 17:21:21,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:21:21,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-01-09 17:21:21,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:21,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:21,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2025-01-09 17:21:21,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:21:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932762889] [2025-01-09 17:21:21,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932762889] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:21:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667114648] [2025-01-09 17:21:21,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:21:21,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:21:21,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:21:21,908 INFO L229 MonitoredProcess]: Starting monitored process 13 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 17:21:21,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 17:21:22,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-01-09 17:21:22,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-01-09 17:21:22,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:21:22,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:21:22,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 122 conjuncts are in the unsatisfiable core [2025-01-09 17:21:22,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:21:22,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-01-09 17:21:22,343 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-01-09 17:21:22,352 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-09 17:21:22,353 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 1 case distinctions, treesize of input 16 treesize of output 15 [2025-01-09 17:21:22,367 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-09 17:21:22,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-09 17:21:22,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-01-09 17:21:22,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-09 17:21:22,414 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2025-01-09 17:21:22,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 47 [2025-01-09 17:21:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:21:22,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2025-01-09 17:21:22,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 11 [2025-01-09 17:21:24,075 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-01-09 17:21:24,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2025-01-09 17:21:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 17:21:40,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:22:03,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:22:03,782 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 39 [2025-01-09 17:22:03,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:22:03,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 456 treesize of output 422 [2025-01-09 17:22:03,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 268 [2025-01-09 17:22:03,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:22:03,821 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 36 [2025-01-09 17:22:03,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:22:03,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 254 [2025-01-09 17:22:03,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 162 [2025-01-09 17:22:03,951 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 6 treesize of output 4 [2025-01-09 17:22:04,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2025-01-09 17:22:04,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2025-01-09 17:22:04,168 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 6 treesize of output 4 [2025-01-09 17:22:04,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:22:04,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 251 [2025-01-09 17:22:04,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:22:04,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 98 [2025-01-09 17:22:04,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667114648] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:22:04,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 17:22:04,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 34] total 44 [2025-01-09 17:22:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368597864] [2025-01-09 17:22:04,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 17:22:04,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-09 17:22:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:04,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-09 17:22:04,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4920, Unknown=19, NotChecked=0, Total=5256 [2025-01-09 17:22:04,739 INFO L87 Difference]: Start difference. First operand 256 states and 324 transitions. Second operand has 44 states, 42 states have (on average 3.119047619047619) internal successors, (131), 41 states have internal predecessors, (131), 13 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24)