./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-loops/overflow_1-2.c --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/bitvector-loops/overflow_1-2.c -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 fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:28:54,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:28:54,143 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:28:54,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:28:54,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:28:54,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:28:54,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:28:54,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:28:54,180 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:28:54,181 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:28:54,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:28:54,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:28:54,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:28:54,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:28:54,182 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:28:54,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:28:54,182 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:28:54,183 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:28:54,184 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:28:54,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:28:54,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:28:54,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:28:54,185 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 -> fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 [2025-02-07 17:28:54,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:28:54,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:28:54,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:28:54,413 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:28:54,413 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:28:54,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2025-02-07 17:28:55,579 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/231fc3c95/3b9482c7a09f489a8157644d051efdb5/FLAGa9e28681a [2025-02-07 17:28:55,842 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:28:55,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2025-02-07 17:28:55,850 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/231fc3c95/3b9482c7a09f489a8157644d051efdb5/FLAGa9e28681a [2025-02-07 17:28:56,154 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/231fc3c95/3b9482c7a09f489a8157644d051efdb5 [2025-02-07 17:28:56,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:28:56,157 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:28:56,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:28:56,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:28:56,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:28:56,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,165 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59354560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56, skipping insertion in model container [2025-02-07 17:28:56,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,178 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:28:56,290 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/bitvector-loops/overflow_1-2.c[324,337] [2025-02-07 17:28:56,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:28:56,304 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:28:56,312 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/bitvector-loops/overflow_1-2.c[324,337] [2025-02-07 17:28:56,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:28:56,322 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:28:56,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56 WrapperNode [2025-02-07 17:28:56,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:28:56,324 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:28:56,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:28:56,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:28:56,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,341 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 19 [2025-02-07 17:28:56,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:28:56,342 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:28:56,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:28:56,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:28:56,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,349 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,356 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 17:28:56,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,356 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,357 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:28:56,362 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:28:56,362 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:28:56,362 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:28:56,363 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (1/1) ... [2025-02-07 17:28:56,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:28:56,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:28:56,389 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 17:28:56,391 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 17:28:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:28:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:28:56,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:28:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:28:56,449 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:28:56,451 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:28:56,521 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 17:28:56,522 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:28:56,527 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:28:56,527 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:28:56,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:28:56 BoogieIcfgContainer [2025-02-07 17:28:56,527 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:28:56,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:28:56,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:28:56,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:28:56,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:28:56" (1/3) ... [2025-02-07 17:28:56,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73eff16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:28:56, skipping insertion in model container [2025-02-07 17:28:56,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:28:56" (2/3) ... [2025-02-07 17:28:56,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73eff16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:28:56, skipping insertion in model container [2025-02-07 17:28:56,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:28:56" (3/3) ... [2025-02-07 17:28:56,536 INFO L128 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2025-02-07 17:28:56,547 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:28:56,548 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG overflow_1-2.c that has 1 procedures, 8 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 17:28:56,584 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:28:56,593 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;@5858983c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:28:56,594 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:28:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-02-07 17:28:56,600 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:28:56,601 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-02-07 17:28:56,601 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:28:56,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:28:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1136958, now seen corresponding path program 1 times [2025-02-07 17:28:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:28:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183090764] [2025-02-07 17:28:56,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:28:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:28:56,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-07 17:28:56,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-07 17:28:56,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:28:56,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:56,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:28:56,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183090764] [2025-02-07 17:28:56,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183090764] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:28:56,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:28:56,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 17:28:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040239998] [2025-02-07 17:28:56,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:28:56,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:28:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:28:56,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:28:56,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:28:56,825 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:28:56,845 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2025-02-07 17:28:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:28:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-02-07 17:28:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:28:56,851 INFO L225 Difference]: With dead ends: 15 [2025-02-07 17:28:56,851 INFO L226 Difference]: Without dead ends: 6 [2025-02-07 17:28:56,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:28:56,855 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:28:56,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:28:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2025-02-07 17:28:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2025-02-07 17:28:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2025-02-07 17:28:56,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2025-02-07 17:28:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:28:56,878 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2025-02-07 17:28:56,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2025-02-07 17:28:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-07 17:28:56,878 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:28:56,878 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-07 17:28:56,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:28:56,879 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:28:56,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:28:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash 35277444, now seen corresponding path program 1 times [2025-02-07 17:28:56,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:28:56,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301326541] [2025-02-07 17:28:56,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:28:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:28:56,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 17:28:56,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 17:28:56,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:28:56,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:56,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:28:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301326541] [2025-02-07 17:28:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301326541] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:28:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126771989] [2025-02-07 17:28:56,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:28:56,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:28:56,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:28:56,990 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 17:28:56,998 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 17:28:57,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 17:28:57,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 17:28:57,032 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:28:57,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:57,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-07 17:28:57,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:28:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:57,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:28:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:57,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126771989] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:28:57,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:28:57,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-02-07 17:28:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860826774] [2025-02-07 17:28:57,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:28:57,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:28:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:28:57,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:28:57,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:28:57,084 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:28:57,118 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2025-02-07 17:28:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 17:28:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-02-07 17:28:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:28:57,119 INFO L225 Difference]: With dead ends: 12 [2025-02-07 17:28:57,119 INFO L226 Difference]: Without dead ends: 9 [2025-02-07 17:28:57,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:28:57,120 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:28:57,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:28:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-07 17:28:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-02-07 17:28:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2025-02-07 17:28:57,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2025-02-07 17:28:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:28:57,126 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2025-02-07 17:28:57,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2025-02-07 17:28:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 17:28:57,126 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:28:57,126 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2025-02-07 17:28:57,133 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 17:28:57,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:28:57,327 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:28:57,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:28:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1285129538, now seen corresponding path program 2 times [2025-02-07 17:28:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:28:57,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523168600] [2025-02-07 17:28:57,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:28:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:28:57,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-02-07 17:28:57,338 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 17:28:57,339 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:28:57,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:57,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:28:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523168600] [2025-02-07 17:28:57,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523168600] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:28:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397630249] [2025-02-07 17:28:57,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:28:57,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:28:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:28:57,432 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 17:28:57,433 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 17:28:57,463 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-02-07 17:28:57,471 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 17:28:57,471 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:28:57,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:57,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 17:28:57,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:28:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:57,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:28:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:57,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397630249] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:28:57,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:28:57,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-07 17:28:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947660239] [2025-02-07 17:28:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:28:57,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 17:28:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:28:57,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 17:28:57,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2025-02-07 17:28:57,606 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:28:57,766 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2025-02-07 17:28:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:28:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 17:28:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:28:57,768 INFO L225 Difference]: With dead ends: 18 [2025-02-07 17:28:57,768 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 17:28:57,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:28:57,769 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:28:57,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:28:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 17:28:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-02-07 17:28:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2025-02-07 17:28:57,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2025-02-07 17:28:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:28:57,777 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2025-02-07 17:28:57,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2025-02-07 17:28:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 17:28:57,778 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:28:57,779 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2025-02-07 17:28:57,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 17:28:57,979 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 17:28:57,980 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:28:57,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:28:57,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1273477890, now seen corresponding path program 3 times [2025-02-07 17:28:57,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:28:57,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481341138] [2025-02-07 17:28:57,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:28:57,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:28:57,990 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 6 equivalence classes. [2025-02-07 17:28:58,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:28:58,026 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:28:58,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:58,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:28:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481341138] [2025-02-07 17:28:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481341138] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:28:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29627205] [2025-02-07 17:28:58,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:28:58,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:28:58,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:28:58,331 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 17:28:58,336 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 17:28:58,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 6 equivalence classes. [2025-02-07 17:28:58,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:28:58,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:28:58,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:28:58,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 17:28:58,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:28:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:58,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:28:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:28:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29627205] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:28:58,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:28:58,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2025-02-07 17:28:58,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088217178] [2025-02-07 17:28:58,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:28:58,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 17:28:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:28:58,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 17:28:58,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2025-02-07 17:28:58,719 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:28:59,319 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2025-02-07 17:28:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 17:28:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-07 17:28:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:28:59,320 INFO L225 Difference]: With dead ends: 30 [2025-02-07 17:28:59,320 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 17:28:59,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:28:59,321 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:28:59,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:28:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 17:28:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 17:28:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2025-02-07 17:28:59,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2025-02-07 17:28:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:28:59,325 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2025-02-07 17:28:59,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:28:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2025-02-07 17:28:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 17:28:59,326 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:28:59,326 INFO L218 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2025-02-07 17:28:59,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 17:28:59,530 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 17:28:59,530 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:28:59,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:28:59,531 INFO L85 PathProgramCache]: Analyzing trace with hash 325962110, now seen corresponding path program 4 times [2025-02-07 17:28:59,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:28:59,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111342203] [2025-02-07 17:28:59,531 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:28:59,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:28:59,535 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:28:59,561 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:28:59,561 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:28:59,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:29:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:29:00,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:29:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111342203] [2025-02-07 17:29:00,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111342203] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:29:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609555922] [2025-02-07 17:29:00,009 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:29:00,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:29:00,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:29:00,011 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 17:29:00,013 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 17:29:00,032 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 17:29:00,051 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 17:29:00,052 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:29:00,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:29:00,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 17:29:00,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:29:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:29:00,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:29:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:29:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609555922] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:29:01,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:29:01,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2025-02-07 17:29:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778479229] [2025-02-07 17:29:01,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:29:01,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 17:29:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:29:01,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 17:29:01,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1726, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 17:29:01,025 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:29:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:29:04,954 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2025-02-07 17:29:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 17:29:04,957 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 17:29:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:29:04,958 INFO L225 Difference]: With dead ends: 54 [2025-02-07 17:29:04,958 INFO L226 Difference]: Without dead ends: 51 [2025-02-07 17:29:04,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1220, Invalid=3750, Unknown=0, NotChecked=0, Total=4970 [2025-02-07 17:29:04,960 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:29:04,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 17:29:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-07 17:29:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-02-07 17:29:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:29:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2025-02-07 17:29:04,972 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2025-02-07 17:29:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:29:04,972 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2025-02-07 17:29:04,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:29:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2025-02-07 17:29:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 17:29:04,974 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:29:04,974 INFO L218 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2025-02-07 17:29:04,983 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 17:29:05,175 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 17:29:05,175 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:29:05,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:29:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash -598699394, now seen corresponding path program 5 times [2025-02-07 17:29:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:29:05,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521136154] [2025-02-07 17:29:05,176 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:29:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:29:05,185 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 24 equivalence classes. [2025-02-07 17:29:05,267 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:29:05,267 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 17:29:05,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:29:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:29:06,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:29:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521136154] [2025-02-07 17:29:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521136154] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:29:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421486334] [2025-02-07 17:29:06,479 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:29:06,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:29:06,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:29:06,481 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 17:29:06,484 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 17:29:06,505 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 24 equivalence classes. [2025-02-07 17:29:06,791 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:29:06,791 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 17:29:06,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:29:06,797 WARN L254 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-07 17:29:06,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:29:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:29:06,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:29:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:29:09,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421486334] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:29:09,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:29:09,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2025-02-07 17:29:09,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204693135] [2025-02-07 17:29:09,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:29:09,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-02-07 17:29:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:29:09,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-02-07 17:29:09,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=6910, Unknown=0, NotChecked=0, Total=9312 [2025-02-07 17:29:09,788 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:30:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:30:00,170 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2025-02-07 17:30:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-02-07 17:30:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-07 17:30:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:30:00,171 INFO L225 Difference]: With dead ends: 102 [2025-02-07 17:30:00,171 INFO L226 Difference]: Without dead ends: 99 [2025-02-07 17:30:00,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=4748, Invalid=15558, Unknown=0, NotChecked=0, Total=20306 [2025-02-07 17:30:00,178 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 17:30:00,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 17:30:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-02-07 17:30:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2025-02-07 17:30:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:30:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2025-02-07 17:30:00,206 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2025-02-07 17:30:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:30:00,206 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2025-02-07 17:30:00,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:30:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2025-02-07 17:30:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-02-07 17:30:00,208 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:30:00,208 INFO L218 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2025-02-07 17:30:00,214 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 17:30:00,412 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 17:30:00,413 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:30:00,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:30:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1383408766, now seen corresponding path program 6 times [2025-02-07 17:30:00,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:30:00,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914301698] [2025-02-07 17:30:00,414 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:30:00,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:30:00,425 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 98 statements into 48 equivalence classes. [2025-02-07 17:30:00,538 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 98 of 98 statements. [2025-02-07 17:30:00,538 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-02-07 17:30:00,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:30:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:30:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:30:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914301698] [2025-02-07 17:30:04,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914301698] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:30:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388948209] [2025-02-07 17:30:04,638 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:30:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:30:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:30:04,643 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 17:30:04,645 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 17:30:04,678 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 98 statements into 48 equivalence classes. [2025-02-07 17:30:06,640 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 98 of 98 statements. [2025-02-07 17:30:06,640 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-02-07 17:30:06,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:30:06,646 WARN L254 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 191 conjuncts are in the unsatisfiable core [2025-02-07 17:30:06,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:30:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:30:06,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:30:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:30:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388948209] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:30:17,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:30:17,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2025-02-07 17:30:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061017465] [2025-02-07 17:30:17,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:30:17,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2025-02-07 17:30:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:30:17,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2025-02-07 17:30:17,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9410, Invalid=27646, Unknown=0, NotChecked=0, Total=37056 [2025-02-07 17:30:17,859 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:30:35,892 WARN L286 SmtUtils]: Spent 14.93s on a formula simplification. DAG size of input: 385 DAG size of output: 100 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)