./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.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_rbegin_harness_negated.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 5d0330b863a3199999a1d87752dfb6e311192d268b0239668c112b8f01744457 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 17:22:46,735 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 17:22:46,769 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-01-09 17:22:46,772 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 17:22:46,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 17:22:46,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 17:22:46,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 17:22:46,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 17:22:46,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 17:22:46,786 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 17:22:46,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 17:22:46,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 17:22:46,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 17:22:46,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 17:22:46,787 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 17:22:46,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 17:22:46,787 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 17:22:46,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 17:22:46,787 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 17:22:46,788 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 17:22:46,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:22:46,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:22:46,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 17:22:46,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 17:22:46,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 17:22:46,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 17:22:46,790 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 -> 5d0330b863a3199999a1d87752dfb6e311192d268b0239668c112b8f01744457 [2025-01-09 17:22:46,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 17:22:47,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 17:22:47,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 17:22:47,017 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 17:22:47,017 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 17:22:47,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i [2025-01-09 17:22:48,163 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15bd3d624/8d756d838c8e4943adb15a69d76f567b/FLAG7f082711e [2025-01-09 17:22:48,642 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 17:22:48,642 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness_negated.i [2025-01-09 17:22:48,672 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15bd3d624/8d756d838c8e4943adb15a69d76f567b/FLAG7f082711e [2025-01-09 17:22:48,745 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/15bd3d624/8d756d838c8e4943adb15a69d76f567b [2025-01-09 17:22:48,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 17:22:48,748 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 17:22:48,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 17:22:48,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 17:22:48,754 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 17:22:48,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 05:22:48" (1/1) ... [2025-01-09 17:22:48,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c85c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:48, skipping insertion in model container [2025-01-09 17:22:48,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 05:22:48" (1/1) ... [2025-01-09 17:22:48,813 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 17:22:48,997 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_rbegin_harness_negated.i[4496,4509] [2025-01-09 17:22:49,005 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_rbegin_harness_negated.i[4556,4569] [2025-01-09 17:22:49,504 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,504 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,504 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,505 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,505 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,515 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,516 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,517 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,517 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,519 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,519 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,520 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,520 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,827 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_rbegin_harness_negated.i[150690,150703] [2025-01-09 17:22:49,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 17:22:49,844 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 17:22:49,854 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_rbegin_harness_negated.i[4496,4509] [2025-01-09 17:22:49,854 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_rbegin_harness_negated.i[4556,4569] [2025-01-09 17:22:49,912 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,912 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,912 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,913 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,913 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,923 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,926 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,927 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,927 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,928 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,928 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,929 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:49,929 WARN L1731 CHandler]: Possible shadowing of function index [2025-01-09 17:22:50,050 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_rbegin_harness_negated.i[150690,150703] [2025-01-09 17:22:50,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 17:22:50,146 INFO L204 MainTranslator]: Completed translation [2025-01-09 17:22:50,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50 WrapperNode [2025-01-09 17:22:50,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 17:22:50,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 17:22:50,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 17:22:50,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 17:22:50,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,198 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,217 INFO L138 Inliner]: procedures = 668, calls = 1039, calls flagged for inlining = 53, calls inlined = 6, statements flattened = 137 [2025-01-09 17:22:50,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 17:22:50,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 17:22:50,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 17:22:50,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 17:22:50,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,252 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [2, 17, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 6 writes are split as follows [0, 6, 0]. [2025-01-09 17:22:50,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,254 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,268 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,270 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,276 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 17:22:50,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 17:22:50,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 17:22:50,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 17:22:50,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (1/1) ... [2025-01-09 17:22:50,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 17:22:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:22:50,308 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 17:22:50,312 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 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 17:22:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2025-01-09 17:22:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2025-01-09 17:22:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 17:22:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 17:22:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 17:22:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2025-01-09 17:22:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 17:22:50,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 17:22:50,522 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 17:22:50,523 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 17:22:50,705 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2025-01-09 17:22:50,705 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 17:22:50,711 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 17:22:50,712 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 17:22:50,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 05:22:50 BoogieIcfgContainer [2025-01-09 17:22:50,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 17:22:50,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 17:22:50,713 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 17:22:50,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 17:22:50,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 05:22:48" (1/3) ... [2025-01-09 17:22:50,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caac4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 05:22:50, skipping insertion in model container [2025-01-09 17:22:50,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 05:22:50" (2/3) ... [2025-01-09 17:22:50,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caac4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 05:22:50, skipping insertion in model container [2025-01-09 17:22:50,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 05:22:50" (3/3) ... [2025-01-09 17:22:50,718 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness_negated.i [2025-01-09 17:22:50,727 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 17:22:50,728 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_rbegin_harness_negated.i that has 6 procedures, 67 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 17:22:50,779 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 17:22:50,789 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;@46f274de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 17:22:50,789 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 17:22:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 48 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-01-09 17:22:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-01-09 17:22:50,796 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:50,797 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:50,797 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:50,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash -810565289, now seen corresponding path program 1 times [2025-01-09 17:22:50,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:50,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209680507] [2025-01-09 17:22:50,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:50,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:50,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 17:22:50,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 17:22:50,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:50,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-01-09 17:22:51,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:51,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209680507] [2025-01-09 17:22:51,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209680507] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:22:51,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138910177] [2025-01-09 17:22:51,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:51,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:22:51,139 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 17:22:51,140 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 17:22:51,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 17:22:51,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 17:22:51,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:51,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:51,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 17:22:51,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:22:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-01-09 17:22:51,317 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:22:51,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138910177] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:22:51,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:22:51,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 17:22:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033281583] [2025-01-09 17:22:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:22:51,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 17:22:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:51,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 17:22:51,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 17:22:51,338 INFO L87 Difference]: Start difference. First operand has 67 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 48 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:22:51,358 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2025-01-09 17:22:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 17:22:51,359 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2025-01-09 17:22:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:22:51,363 INFO L225 Difference]: With dead ends: 126 [2025-01-09 17:22:51,364 INFO L226 Difference]: Without dead ends: 62 [2025-01-09 17:22:51,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 68 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 17:22:51,367 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:22:51,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:22:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-01-09 17:22:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2025-01-09 17:22:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-01-09 17:22:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2025-01-09 17:22:51,402 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 67 [2025-01-09 17:22:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:22:51,403 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2025-01-09 17:22:51,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2025-01-09 17:22:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-01-09 17:22:51,406 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:51,406 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:51,423 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 17:22:51,607 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 17:22:51,607 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:51,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:51,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2071123345, now seen corresponding path program 1 times [2025-01-09 17:22:51,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:51,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442661581] [2025-01-09 17:22:51,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:51,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:51,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 17:22:51,718 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 17:22:51,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:51,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-01-09 17:22:52,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:52,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442661581] [2025-01-09 17:22:52,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442661581] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:22:52,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 17:22:52,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 17:22:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792517510] [2025-01-09 17:22:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:22:52,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 17:22:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:52,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 17:22:52,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 17:22:52,252 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2025-01-09 17:22:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:22:52,307 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2025-01-09 17:22:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 17:22:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2025-01-09 17:22:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:22:52,310 INFO L225 Difference]: With dead ends: 72 [2025-01-09 17:22:52,310 INFO L226 Difference]: Without dead ends: 70 [2025-01-09 17:22:52,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 17:22:52,311 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 17:22:52,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 382 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 17:22:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-01-09 17:22:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2025-01-09 17:22:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 49 states have internal predecessors, (60), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2025-01-09 17:22:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2025-01-09 17:22:52,320 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 67 [2025-01-09 17:22:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:22:52,321 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2025-01-09 17:22:52,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2025-01-09 17:22:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2025-01-09 17:22:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-01-09 17:22:52,322 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:52,322 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:52,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 17:22:52,324 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:52,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1049237357, now seen corresponding path program 1 times [2025-01-09 17:22:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:52,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614084670] [2025-01-09 17:22:52,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:52,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-01-09 17:22:52,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 17:22:52,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:52,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 17:22:52,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614084670] [2025-01-09 17:22:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614084670] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:22:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026591054] [2025-01-09 17:22:52,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:52,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:22:52,752 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 17:22:52,777 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 17:22:52,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-01-09 17:22:52,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-01-09 17:22:52,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:52,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:52,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 17:22:52,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:22:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 17:22:53,070 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:22:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026591054] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:22:53,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:22:53,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2025-01-09 17:22:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799095471] [2025-01-09 17:22:53,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:22:53,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 17:22:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:53,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 17:22:53,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2025-01-09 17:22:53,071 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:22:53,253 INFO L93 Difference]: Finished difference Result 131 states and 174 transitions. [2025-01-09 17:22:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 17:22:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2025-01-09 17:22:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:22:53,255 INFO L225 Difference]: With dead ends: 131 [2025-01-09 17:22:53,255 INFO L226 Difference]: Without dead ends: 71 [2025-01-09 17:22:53,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2025-01-09 17:22:53,256 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 92 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 17:22:53,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 298 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 17:22:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-09 17:22:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2025-01-09 17:22:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 49 states have internal predecessors, (59), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2025-01-09 17:22:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2025-01-09 17:22:53,263 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 69 [2025-01-09 17:22:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:22:53,263 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2025-01-09 17:22:53,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2025-01-09 17:22:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-01-09 17:22:53,265 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:53,265 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:53,271 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 17:22:53,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:53,469 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:53,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1493818345, now seen corresponding path program 1 times [2025-01-09 17:22:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:53,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811942658] [2025-01-09 17:22:53,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:53,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:53,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-01-09 17:22:53,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-01-09 17:22:53,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:53,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 17:22:53,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811942658] [2025-01-09 17:22:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811942658] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:22:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156200794] [2025-01-09 17:22:53,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:53,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:22:53,738 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 17:22:53,740 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 17:22:53,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-01-09 17:22:53,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-01-09 17:22:53,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:53,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:53,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 17:22:53,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:22:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 17:22:53,972 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:22:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156200794] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:22:53,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:22:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2025-01-09 17:22:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105396235] [2025-01-09 17:22:53,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:22:53,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 17:22:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:53,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 17:22:53,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2025-01-09 17:22:53,973 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:22:54,172 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2025-01-09 17:22:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 17:22:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2025-01-09 17:22:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:22:54,174 INFO L225 Difference]: With dead ends: 137 [2025-01-09 17:22:54,174 INFO L226 Difference]: Without dead ends: 76 [2025-01-09 17:22:54,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2025-01-09 17:22:54,175 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 106 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 17:22:54,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 332 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 17:22:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-01-09 17:22:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2025-01-09 17:22:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2025-01-09 17:22:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2025-01-09 17:22:54,182 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 71 [2025-01-09 17:22:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:22:54,182 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2025-01-09 17:22:54,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2025-01-09 17:22:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-01-09 17:22:54,183 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:54,183 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:54,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 17:22:54,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:54,384 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:54,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash -886116325, now seen corresponding path program 1 times [2025-01-09 17:22:54,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:54,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502134964] [2025-01-09 17:22:54,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:54,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:54,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 17:22:54,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 17:22:54,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:54,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-09 17:22:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502134964] [2025-01-09 17:22:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502134964] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:22:54,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486522199] [2025-01-09 17:22:54,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:54,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:54,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:22:54,605 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 17:22:54,606 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 17:22:54,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 17:22:54,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 17:22:54,721 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:54,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:54,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 17:22:54,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:22:54,770 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 17:22:54,778 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 17:22:54,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:22:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:22:54,814 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 13 [2025-01-09 17:22:54,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:22:54,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:22:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 17:22:54,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2025-01-09 17:22:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 17:22:55,400 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 17:22:55,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486522199] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:22:55,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 17:22:55,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2025-01-09 17:22:55,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064957118] [2025-01-09 17:22:55,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:22:55,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 17:22:55,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:55,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 17:22:55,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-01-09 17:22:55,402 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-01-09 17:22:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:22:55,832 INFO L93 Difference]: Finished difference Result 192 states and 254 transitions. [2025-01-09 17:22:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 17:22:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2025-01-09 17:22:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:22:55,834 INFO L225 Difference]: With dead ends: 192 [2025-01-09 17:22:55,834 INFO L226 Difference]: Without dead ends: 132 [2025-01-09 17:22:55,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-01-09 17:22:55,835 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 44 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 17:22:55,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 434 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 17:22:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-01-09 17:22:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2025-01-09 17:22:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2025-01-09 17:22:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2025-01-09 17:22:55,848 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 73 [2025-01-09 17:22:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:22:55,849 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2025-01-09 17:22:55,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-01-09 17:22:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2025-01-09 17:22:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-01-09 17:22:55,850 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:55,850 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:55,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 17:22:56,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:56,055 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:56,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1154179672, now seen corresponding path program 1 times [2025-01-09 17:22:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:56,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552912211] [2025-01-09 17:22:56,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:56,070 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-01-09 17:22:56,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 17:22:56,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:56,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 17:22:56,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:56,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552912211] [2025-01-09 17:22:56,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552912211] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 17:22:56,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 17:22:56,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 17:22:56,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664691916] [2025-01-09 17:22:56,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 17:22:56,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 17:22:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:22:56,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 17:22:56,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 17:22:56,231 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 17:22:56,334 INFO L93 Difference]: Finished difference Result 265 states and 354 transitions. [2025-01-09 17:22:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 17:22:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2025-01-09 17:22:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 17:22:56,335 INFO L225 Difference]: With dead ends: 265 [2025-01-09 17:22:56,336 INFO L226 Difference]: Without dead ends: 142 [2025-01-09 17:22:56,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-09 17:22:56,337 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 17:22:56,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 394 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 17:22:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-01-09 17:22:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2025-01-09 17:22:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 96 states have internal predecessors, (116), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2025-01-09 17:22:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 174 transitions. [2025-01-09 17:22:56,354 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 174 transitions. Word has length 72 [2025-01-09 17:22:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 17:22:56,354 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 174 transitions. [2025-01-09 17:22:56,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-01-09 17:22:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 174 transitions. [2025-01-09 17:22:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-01-09 17:22:56,356 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 17:22:56,356 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 17:22:56,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 17:22:56,356 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 17:22:56,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 17:22:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2103554219, now seen corresponding path program 1 times [2025-01-09 17:22:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 17:22:56,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218300994] [2025-01-09 17:22:56,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:56,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 17:22:56,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 17:22:56,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 17:22:56,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:56,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-09 17:22:56,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 17:22:56,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218300994] [2025-01-09 17:22:56,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218300994] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 17:22:56,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031188391] [2025-01-09 17:22:56,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 17:22:56,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 17:22:56,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 17:22:56,547 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 17:22:56,549 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 17:22:56,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 17:22:56,711 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 17:22:56,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 17:22:56,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 17:22:56,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-01-09 17:22:56,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 17:22:56,803 INFO L349 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2025-01-09 17:22:56,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 80 [2025-01-09 17:22:56,811 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 16 treesize of output 15 [2025-01-09 17:22:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2025-01-09 17:22:56,830 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 16 treesize of output 1 [2025-01-09 17:22:56,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 20 [2025-01-09 17:23:11,808 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_8| Int) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset_BEFORE_CALL_8| Int)) (let ((.cse1 (+ |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset_BEFORE_CALL_8| 24))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16|) .cse1))) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_8| .cse0) (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int))) (and (= .cse0 (select v_DerPreprocessor_2 .cse1)) (= v_DerPreprocessor_1 (select (store (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_8| v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16| v_DerPreprocessor_2) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_8|)))) (<= |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_8|))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16|) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset_BEFORE_CALL_8| Int)) (< |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16| (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_16|) (+ |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset_BEFORE_CALL_8| 24))))))) is different from true [2025-01-09 17:23:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 34 proven. 0 refuted. 11 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 17:23:25,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 17:23:25,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 17:23:25,473 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 318 treesize of output 310 [2025-01-09 17:23:25,479 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 162 treesize of output 146 [2025-01-09 17:23:25,514 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 129 treesize of output 117 [2025-01-09 17:23:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-01-09 17:23:35,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031188391] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 17:23:35,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 17:23:35,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 11] total 27 [2025-01-09 17:23:35,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282909770] [2025-01-09 17:23:35,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 17:23:35,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 17:23:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 17:23:35,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 17:23:35,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=565, Unknown=13, NotChecked=48, Total=702 [2025-01-09 17:23:35,930 INFO L87 Difference]: Start difference. First operand 132 states and 174 transitions. Second operand has 27 states, 24 states have (on average 4.041666666666667) internal successors, (97), 25 states have internal predecessors, (97), 9 states have call successors, (22), 5 states have call predecessors, (22), 8 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2025-01-09 17:23:39,936 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 17:23:43,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:23:52,257 WARN L539 Checker$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 17:23:56,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:24:00,348 WARN L539 Checker$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 17:24:06,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:24:10,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:24:14,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:24:22,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:24:26,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 17:24:30,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]