./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:07:17,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:07:17,116 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:07:17,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:07:17,125 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:07:17,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:07:17,148 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:07:17,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:07:17,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:07:17,149 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:07:17,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:07:17,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:07:17,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:07:17,150 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:07:17,150 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:07:17,150 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:07:17,151 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:07:17,152 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:07:17,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:17,153 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:07:17,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:07:17,153 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 [2025-02-07 21:07:17,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:07:17,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:07:17,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:07:17,437 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:07:17,437 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:07:17,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2025-02-07 21:07:18,735 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/999650d49/cb5e3647ace44be5843b747fa3459042/FLAGfc95451fc [2025-02-07 21:07:19,052 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:07:19,052 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2025-02-07 21:07:19,062 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/999650d49/cb5e3647ace44be5843b747fa3459042/FLAGfc95451fc [2025-02-07 21:07:19,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/999650d49/cb5e3647ace44be5843b747fa3459042 [2025-02-07 21:07:19,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:07:19,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:07:19,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:19,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:07:19,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:07:19,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2959b12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19, skipping insertion in model container [2025-02-07 21:07:19,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,116 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:07:19,246 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/recursified_loop-crafted/recursified_simple_array_index_value_4.i[1803,1816] [2025-02-07 21:07:19,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:19,277 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:07:19,288 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/recursified_loop-crafted/recursified_simple_array_index_value_4.i[1803,1816] [2025-02-07 21:07:19,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:07:19,315 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:07:19,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19 WrapperNode [2025-02-07 21:07:19,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:07:19,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:19,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:07:19,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:07:19,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,341 INFO L138 Inliner]: procedures = 20, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2025-02-07 21:07:19,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:07:19,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:07:19,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:07:19,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:07:19,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,376 INFO L175 MemorySlicer]: Split 37 memory accesses to 6 slices as follows [2, 5, 11, 3, 11, 5]. 30 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 0, 1, 0, 1]. The 9 writes are split as follows [0, 1, 3, 1, 3, 1]. [2025-02-07 21:07:19,376 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,377 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,386 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:07:19,396 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:07:19,396 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:07:19,397 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:07:19,400 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (1/1) ... [2025-02-07 21:07:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:07:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:19,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 21:07:19,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 21:07:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_41_0 [2025-02-07 21:07:19,454 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_41_0 [2025-02-07 21:07:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:07:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_49_to_54_0 [2025-02-07 21:07:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_49_to_54_0 [2025-02-07 21:07:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 21:07:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 21:07:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:07:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 21:07:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 21:07:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-07 21:07:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-07 21:07:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_58_to_61_0 [2025-02-07 21:07:19,457 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_58_to_61_0 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:07:19,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 21:07:19,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 21:07:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 21:07:19,548 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:07:19,550 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:07:19,822 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-02-07 21:07:19,823 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:07:19,833 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:07:19,833 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:07:19,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:19 BoogieIcfgContainer [2025-02-07 21:07:19,834 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:07:19,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:07:19,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:07:19,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:07:19,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:07:19" (1/3) ... [2025-02-07 21:07:19,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0e73ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:19, skipping insertion in model container [2025-02-07 21:07:19,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:07:19" (2/3) ... [2025-02-07 21:07:19,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0e73ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:07:19, skipping insertion in model container [2025-02-07 21:07:19,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:07:19" (3/3) ... [2025-02-07 21:07:19,842 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_4.i [2025-02-07 21:07:19,855 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:07:19,858 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_simple_array_index_value_4.i that has 6 procedures, 46 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:07:19,900 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:07:19,914 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;@3ddae6b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:07:19,914 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:07:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-07 21:07:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 21:07:19,922 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:19,923 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:19,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:19,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash 768999593, now seen corresponding path program 1 times [2025-02-07 21:07:19,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:19,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698998679] [2025-02-07 21:07:19,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:20,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-07 21:07:20,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:07:20,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:20,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:07:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:20,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698998679] [2025-02-07 21:07:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698998679] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:20,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088653504] [2025-02-07 21:07:20,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:20,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:07:20,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 21:07:20,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-07 21:07:20,282 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:07:20,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:20,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:20,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-07 21:07:20,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 21:07:20,299 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 21:07:20,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088653504] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:20,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 21:07:20,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-07 21:07:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868018310] [2025-02-07 21:07:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:20,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 21:07:20,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:20,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 21:07:20,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 21:07:20,323 INFO L87 Difference]: Start difference. First operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 33 states have internal predecessors, (36), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:07:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:20,344 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2025-02-07 21:07:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 21:07:20,346 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-02-07 21:07:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:20,351 INFO L225 Difference]: With dead ends: 83 [2025-02-07 21:07:20,351 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 21:07:20,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 21:07:20,358 INFO L435 NwaCegarLoop]: 56 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, 56 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:20,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:07:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 21:07:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-07 21:07:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-07 21:07:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-02-07 21:07:20,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2025-02-07 21:07:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:20,391 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-02-07 21:07:20,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:07:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-02-07 21:07:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 21:07:20,393 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:20,393 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:20,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 21:07:20,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-07 21:07:20,596 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:20,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -98990041, now seen corresponding path program 1 times [2025-02-07 21:07:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:20,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008873610] [2025-02-07 21:07:20,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:20,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-07 21:07:20,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 21:07:20,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:20,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:07:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008873610] [2025-02-07 21:07:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008873610] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:20,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:07:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-07 21:07:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758210321] [2025-02-07 21:07:20,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:20,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 21:07:20,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:20,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 21:07:20,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-07 21:07:20,981 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:07:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:21,214 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2025-02-07 21:07:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:07:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-02-07 21:07:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:21,218 INFO L225 Difference]: With dead ends: 77 [2025-02-07 21:07:21,218 INFO L226 Difference]: Without dead ends: 43 [2025-02-07 21:07:21,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-07 21:07:21,219 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:21,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 50 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:07:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-07 21:07:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-02-07 21:07:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2025-02-07 21:07:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2025-02-07 21:07:21,231 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2025-02-07 21:07:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:21,231 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2025-02-07 21:07:21,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:07:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2025-02-07 21:07:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 21:07:21,233 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:21,233 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:21,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 21:07:21,233 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:21,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1711285668, now seen corresponding path program 1 times [2025-02-07 21:07:21,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:21,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648661428] [2025-02-07 21:07:21,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:21,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:21,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 21:07:21,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 21:07:21,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:21,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:07:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648661428] [2025-02-07 21:07:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648661428] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546684507] [2025-02-07 21:07:21,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:21,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:07:21,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 21:07:21,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 21:07:22,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 21:07:22,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:22,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:22,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-07 21:07:22,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:22,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 21:07:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:07:22,316 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 21:07:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546684507] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:22,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 21:07:22,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2025-02-07 21:07:22,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485702376] [2025-02-07 21:07:22,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:22,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 21:07:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:22,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 21:07:22,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2025-02-07 21:07:22,318 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 21:07:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:22,578 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2025-02-07 21:07:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:07:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-02-07 21:07:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:22,580 INFO L225 Difference]: With dead ends: 63 [2025-02-07 21:07:22,580 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 21:07:22,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2025-02-07 21:07:22,581 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:22,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 319 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:07:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 21:07:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2025-02-07 21:07:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 37 states have internal predecessors, (39), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2025-02-07 21:07:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2025-02-07 21:07:22,597 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 32 [2025-02-07 21:07:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:22,597 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2025-02-07 21:07:22,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 21:07:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2025-02-07 21:07:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 21:07:22,598 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:22,598 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:22,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 21:07:22,799 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 [2025-02-07 21:07:22,799 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:22,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1712209189, now seen corresponding path program 1 times [2025-02-07 21:07:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:22,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399878963] [2025-02-07 21:07:22,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:22,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 21:07:22,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 21:07:22,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:22,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:07:23,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399878963] [2025-02-07 21:07:23,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399878963] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487635018] [2025-02-07 21:07:23,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:23,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:23,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:23,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:07:23,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 21:07:23,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-07 21:07:23,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 21:07:23,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:23,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:23,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 21:07:23,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:23,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 21:07:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:07:23,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:07:23,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487635018] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:23,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:23,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2025-02-07 21:07:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797362476] [2025-02-07 21:07:23,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:23,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 21:07:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:23,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 21:07:23,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:07:23,830 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 20 states, 16 states have (on average 2.5) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:07:27,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 21:07:32,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 21:07:36,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 21:07:40,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 21:07:44,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 21:07:48,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-07 21:07:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:48,726 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2025-02-07 21:07:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 21:07:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Word has length 32 [2025-02-07 21:07:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:48,730 INFO L225 Difference]: With dead ends: 119 [2025-02-07 21:07:48,730 INFO L226 Difference]: Without dead ends: 75 [2025-02-07 21:07:48,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2025-02-07 21:07:48,732 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 23 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:48,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 140 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 664 Invalid, 6 Unknown, 0 Unchecked, 24.6s Time] [2025-02-07 21:07:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-02-07 21:07:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2025-02-07 21:07:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 49 states have internal predecessors, (51), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2025-02-07 21:07:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2025-02-07 21:07:48,746 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 32 [2025-02-07 21:07:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:48,746 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2025-02-07 21:07:48,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2025-02-07 21:07:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2025-02-07 21:07:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 21:07:48,748 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:48,748 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:48,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 21:07:48,953 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 [2025-02-07 21:07:48,953 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:48,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1865050700, now seen corresponding path program 1 times [2025-02-07 21:07:48,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:48,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738879007] [2025-02-07 21:07:48,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:48,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:48,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-07 21:07:48,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 21:07:48,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:48,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:07:49,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:49,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738879007] [2025-02-07 21:07:49,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738879007] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:49,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400561399] [2025-02-07 21:07:49,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:49,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:49,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:07:49,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 21:07:49,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-07 21:07:49,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 21:07:49,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:49,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:49,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 21:07:49,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-07 21:07:49,961 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 21:07:49,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400561399] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:07:49,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 21:07:49,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2025-02-07 21:07:49,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764129252] [2025-02-07 21:07:49,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:07:49,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 21:07:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:49,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 21:07:49,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2025-02-07 21:07:49,963 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:07:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:07:50,145 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2025-02-07 21:07:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:07:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2025-02-07 21:07:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:07:50,147 INFO L225 Difference]: With dead ends: 89 [2025-02-07 21:07:50,147 INFO L226 Difference]: Without dead ends: 66 [2025-02-07 21:07:50,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2025-02-07 21:07:50,148 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:07:50,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:07:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-07 21:07:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2025-02-07 21:07:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 44 states have internal predecessors, (45), 13 states have call successors, (13), 9 states have call predecessors, (13), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2025-02-07 21:07:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2025-02-07 21:07:50,157 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 43 [2025-02-07 21:07:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:07:50,157 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2025-02-07 21:07:50,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 21:07:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2025-02-07 21:07:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-07 21:07:50,158 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:07:50,158 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:07:50,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 21:07:50,359 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 [2025-02-07 21:07:50,360 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:07:50,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:07:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash 124377648, now seen corresponding path program 1 times [2025-02-07 21:07:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:07:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176388434] [2025-02-07 21:07:50,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:07:50,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-07 21:07:50,383 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 21:07:50,384 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:50,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-07 21:07:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:07:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176388434] [2025-02-07 21:07:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176388434] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:07:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342516191] [2025-02-07 21:07:51,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:07:51,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:07:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:07:51,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:07:51,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 21:07:51,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-07 21:07:51,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 21:07:51,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:07:51,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:07:51,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 21:07:51,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:07:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-07 21:07:51,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:07:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 21:07:56,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342516191] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:07:56,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:07:56,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 14] total 31 [2025-02-07 21:07:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962198504] [2025-02-07 21:07:56,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:07:56,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 21:07:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:07:56,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 21:07:56,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=796, Unknown=1, NotChecked=0, Total=930 [2025-02-07 21:07:56,236 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 31 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 27 states have internal predecessors, (50), 9 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-07 21:08:00,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:04,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:16,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:20,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:08:20,854 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2025-02-07 21:08:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 21:08:20,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 27 states have internal predecessors, (50), 9 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 9 states have call successors, (17) Word has length 53 [2025-02-07 21:08:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:08:20,857 INFO L225 Difference]: With dead ends: 123 [2025-02-07 21:08:20,857 INFO L226 Difference]: Without dead ends: 69 [2025-02-07 21:08:20,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=177, Invalid=1010, Unknown=3, NotChecked=0, Total=1190 [2025-02-07 21:08:20,859 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 23 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:08:20,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 159 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 705 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2025-02-07 21:08:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-02-07 21:08:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2025-02-07 21:08:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 46 states have internal predecessors, (47), 13 states have call successors, (13), 9 states have call predecessors, (13), 12 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2025-02-07 21:08:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2025-02-07 21:08:20,869 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 53 [2025-02-07 21:08:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:08:20,869 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2025-02-07 21:08:20,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 27 states have internal predecessors, (50), 9 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-07 21:08:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2025-02-07 21:08:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-02-07 21:08:20,870 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:08:20,871 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:08:20,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 21:08:21,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:21,073 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:08:21,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:08:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1548014024, now seen corresponding path program 2 times [2025-02-07 21:08:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:08:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294625884] [2025-02-07 21:08:21,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:08:21,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 63 statements into 2 equivalence classes. [2025-02-07 21:08:21,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 21:08:21,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:21,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-07 21:08:22,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:08:22,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294625884] [2025-02-07 21:08:22,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294625884] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:08:22,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183279210] [2025-02-07 21:08:22,208 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:08:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:08:22,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:08:22,210 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 21:08:22,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 21:08:22,293 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 63 statements into 2 equivalence classes. [2025-02-07 21:08:22,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-02-07 21:08:22,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:08:22,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:08:22,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-02-07 21:08:22,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:08:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 21:08:22,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:08:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 21:08:48,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183279210] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:08:48,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:08:48,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 22] total 42 [2025-02-07 21:08:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3285715] [2025-02-07 21:08:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:08:48,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-07 21:08:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:08:48,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-07 21:08:48,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1519, Unknown=6, NotChecked=0, Total=1722 [2025-02-07 21:08:48,716 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 42 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 10 states have call successors, (19), 8 states have call predecessors, (19), 17 states have return successors, (23), 13 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-07 21:08:52,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-02-07 21:08:56,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []