./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 10:38:38,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 10:38:38,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 10:38:38,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 10:38:38,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 10:38:38,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 10:38:38,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 10:38:38,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 10:38:38,423 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 10:38:38,423 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 10:38:38,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 10:38:38,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 10:38:38,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 10:38:38,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 10:38:38,424 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 10:38:38,425 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:38:38,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 10:38:38,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 10:38:38,425 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 -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2025-02-05 10:38:38,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 10:38:38,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 10:38:38,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 10:38:38,628 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 10:38:38,628 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 10:38:38,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-02-05 10:38:39,717 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d69064690/79c04fee251e475f8e4152c1fabf0a04/FLAG7fef69976 [2025-02-05 10:38:39,974 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 10:38:39,975 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-02-05 10:38:39,981 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d69064690/79c04fee251e475f8e4152c1fabf0a04/FLAG7fef69976 [2025-02-05 10:38:40,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d69064690/79c04fee251e475f8e4152c1fabf0a04 [2025-02-05 10:38:40,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 10:38:40,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 10:38:40,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 10:38:40,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 10:38:40,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 10:38:40,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575fa61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40, skipping insertion in model container [2025-02-05 10:38:40,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,298 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 10:38:40,412 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/soft_float_3a.c.cil.c[728,741] [2025-02-05 10:38:40,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:38:40,468 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 10:38:40,477 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/soft_float_3a.c.cil.c[728,741] [2025-02-05 10:38:40,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:38:40,523 INFO L204 MainTranslator]: Completed translation [2025-02-05 10:38:40,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40 WrapperNode [2025-02-05 10:38:40,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 10:38:40,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 10:38:40,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 10:38:40,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 10:38:40,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,554 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2025-02-05 10:38:40,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 10:38:40,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 10:38:40,555 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 10:38:40,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 10:38:40,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,582 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]. [2025-02-05 10:38:40,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,590 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 10:38:40,598 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 10:38:40,598 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 10:38:40,598 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 10:38:40,602 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (1/1) ... [2025-02-05 10:38:40,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:38:40,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:40,627 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) [2025-02-05 10:38:40,630 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 [2025-02-05 10:38:40,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 10:38:40,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 10:38:40,647 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-02-05 10:38:40,647 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-02-05 10:38:40,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 10:38:40,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 10:38:40,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 10:38:40,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 10:38:40,691 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 10:38:40,692 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 10:38:41,016 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2025-02-05 10:38:41,016 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 10:38:41,047 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 10:38:41,048 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 10:38:41,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:38:41 BoogieIcfgContainer [2025-02-05 10:38:41,049 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 10:38:41,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 10:38:41,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 10:38:41,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 10:38:41,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:38:40" (1/3) ... [2025-02-05 10:38:41,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c23b90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:38:41, skipping insertion in model container [2025-02-05 10:38:41,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:38:40" (2/3) ... [2025-02-05 10:38:41,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c23b90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:38:41, skipping insertion in model container [2025-02-05 10:38:41,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:38:41" (3/3) ... [2025-02-05 10:38:41,056 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2025-02-05 10:38:41,069 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 10:38:41,071 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 75 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 10:38:41,113 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 10:38:41,129 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;@7bce39ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 10:38:41,129 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 10:38:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 65 states have (on average 1.523076923076923) internal successors, (99), 68 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 10:38:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 10:38:41,145 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:41,146 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:41,146 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:41,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1068011030, now seen corresponding path program 1 times [2025-02-05 10:38:41,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:41,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028925194] [2025-02-05 10:38:41,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:41,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:41,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 10:38:41,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 10:38:41,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:41,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:38:41,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028925194] [2025-02-05 10:38:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028925194] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:41,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:38:41,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 10:38:41,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032934012] [2025-02-05 10:38:41,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:41,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:38:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:41,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:38:41,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:38:41,503 INFO L87 Difference]: Start difference. First operand has 75 states, 65 states have (on average 1.523076923076923) internal successors, (99), 68 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:41,559 INFO L93 Difference]: Finished difference Result 148 states and 221 transitions. [2025-02-05 10:38:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:38:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2025-02-05 10:38:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:41,567 INFO L225 Difference]: With dead ends: 148 [2025-02-05 10:38:41,568 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 10:38:41,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:38:41,577 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:41,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 10:38:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-05 10:38:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 61 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 10:38:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2025-02-05 10:38:41,607 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 41 [2025-02-05 10:38:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:41,609 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2025-02-05 10:38:41,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2025-02-05 10:38:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 10:38:41,611 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:41,611 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:41,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 10:38:41,612 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:41,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 11490873, now seen corresponding path program 1 times [2025-02-05 10:38:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719700985] [2025-02-05 10:38:41,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:41,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 10:38:41,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 10:38:41,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:41,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:38:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719700985] [2025-02-05 10:38:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719700985] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:41,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:38:41,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 10:38:41,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318911459] [2025-02-05 10:38:41,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:41,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:38:41,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:41,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:38:41,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:38:41,748 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:41,779 INFO L93 Difference]: Finished difference Result 78 states and 106 transitions. [2025-02-05 10:38:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:38:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2025-02-05 10:38:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:41,781 INFO L225 Difference]: With dead ends: 78 [2025-02-05 10:38:41,781 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 10:38:41,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 10:38:41,782 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:41,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 259 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 10:38:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-05 10:38:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 61 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 10:38:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2025-02-05 10:38:41,786 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 43 [2025-02-05 10:38:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:41,786 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2025-02-05 10:38:41,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2025-02-05 10:38:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 10:38:41,787 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:41,788 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:41,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 10:38:41,788 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:41,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1754301208, now seen corresponding path program 1 times [2025-02-05 10:38:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:41,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261749671] [2025-02-05 10:38:41,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:41,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 10:38:41,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 10:38:41,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:41,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:41,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261749671] [2025-02-05 10:38:41,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261749671] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492734394] [2025-02-05 10:38:41,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:41,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:41,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:41,913 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) [2025-02-05 10:38:41,915 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 [2025-02-05 10:38:41,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 10:38:41,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 10:38:41,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:41,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:41,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-05 10:38:41,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:42,010 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:38:42,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492734394] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:42,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:38:42,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-02-05 10:38:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51358544] [2025-02-05 10:38:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:42,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:38:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:42,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:38:42,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:42,011 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:42,112 INFO L93 Difference]: Finished difference Result 146 states and 205 transitions. [2025-02-05 10:38:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 10:38:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2025-02-05 10:38:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:42,114 INFO L225 Difference]: With dead ends: 146 [2025-02-05 10:38:42,114 INFO L226 Difference]: Without dead ends: 81 [2025-02-05 10:38:42,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:38:42,115 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:42,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 212 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-02-05 10:38:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2025-02-05 10:38:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-05 10:38:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2025-02-05 10:38:42,126 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 43 [2025-02-05 10:38:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:42,127 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2025-02-05 10:38:42,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2025-02-05 10:38:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 10:38:42,129 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:42,129 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:42,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 10:38:42,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:42,333 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:42,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1809221301, now seen corresponding path program 1 times [2025-02-05 10:38:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367659588] [2025-02-05 10:38:42,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:42,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 10:38:42,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 10:38:42,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:42,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367659588] [2025-02-05 10:38:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367659588] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734426031] [2025-02-05 10:38:42,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:42,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:42,439 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) [2025-02-05 10:38:42,440 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 [2025-02-05 10:38:42,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-05 10:38:42,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 10:38:42,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:42,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:42,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 10:38:42,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:42,527 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:38:42,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734426031] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:42,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:38:42,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-02-05 10:38:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030981140] [2025-02-05 10:38:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:42,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:38:42,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:42,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:38:42,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:42,529 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:42,571 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2025-02-05 10:38:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:38:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2025-02-05 10:38:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:42,572 INFO L225 Difference]: With dead ends: 144 [2025-02-05 10:38:42,572 INFO L226 Difference]: Without dead ends: 78 [2025-02-05 10:38:42,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:42,573 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:42,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 226 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-02-05 10:38:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-02-05 10:38:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 70 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 10:38:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2025-02-05 10:38:42,577 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 46 [2025-02-05 10:38:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:42,578 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2025-02-05 10:38:42,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2025-02-05 10:38:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 10:38:42,579 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:42,579 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:42,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 10:38:42,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:42,780 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:42,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 293709758, now seen corresponding path program 1 times [2025-02-05 10:38:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095813900] [2025-02-05 10:38:42,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:42,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 10:38:42,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 10:38:42,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:42,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095813900] [2025-02-05 10:38:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095813900] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638776566] [2025-02-05 10:38:42,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:42,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:42,847 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) [2025-02-05 10:38:42,848 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 [2025-02-05 10:38:42,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 10:38:42,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 10:38:42,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:42,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:42,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 10:38:42,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:42,940 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:38:42,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638776566] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:42,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:38:42,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-02-05 10:38:42,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933114644] [2025-02-05 10:38:42,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:42,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 10:38:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:42,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 10:38:42,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:42,941 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:42,985 INFO L93 Difference]: Finished difference Result 155 states and 214 transitions. [2025-02-05 10:38:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 10:38:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2025-02-05 10:38:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:42,986 INFO L225 Difference]: With dead ends: 155 [2025-02-05 10:38:42,986 INFO L226 Difference]: Without dead ends: 84 [2025-02-05 10:38:42,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:42,987 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 15 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:42,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 214 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-05 10:38:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2025-02-05 10:38:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 73 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 10:38:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2025-02-05 10:38:42,992 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 47 [2025-02-05 10:38:42,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:42,992 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2025-02-05 10:38:42,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2025-02-05 10:38:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 10:38:42,993 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:42,993 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:42,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 10:38:43,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:43,194 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:43,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:43,196 INFO L85 PathProgramCache]: Analyzing trace with hash -285662292, now seen corresponding path program 1 times [2025-02-05 10:38:43,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:43,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252174528] [2025-02-05 10:38:43,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:43,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:43,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 10:38:43,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 10:38:43,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:43,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252174528] [2025-02-05 10:38:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252174528] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777589470] [2025-02-05 10:38:43,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:43,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:43,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:43,274 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) [2025-02-05 10:38:43,277 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 [2025-02-05 10:38:43,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 10:38:43,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 10:38:43,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:43,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:43,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:38:43,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:43,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:43,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777589470] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:43,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:43,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-05 10:38:43,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980399104] [2025-02-05 10:38:43,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:43,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 10:38:43,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:43,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 10:38:43,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-02-05 10:38:43,445 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:38:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:43,543 INFO L93 Difference]: Finished difference Result 194 states and 275 transitions. [2025-02-05 10:38:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 10:38:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2025-02-05 10:38:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:43,544 INFO L225 Difference]: With dead ends: 194 [2025-02-05 10:38:43,545 INFO L226 Difference]: Without dead ends: 120 [2025-02-05 10:38:43,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:38:43,545 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 59 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:43,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 455 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-02-05 10:38:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2025-02-05 10:38:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.3950617283950617) internal successors, (113), 82 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 10:38:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2025-02-05 10:38:43,555 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 49 [2025-02-05 10:38:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:43,556 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2025-02-05 10:38:43,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:38:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2025-02-05 10:38:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 10:38:43,557 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:43,557 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:43,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 10:38:43,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 10:38:43,758 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:43,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 518660489, now seen corresponding path program 1 times [2025-02-05 10:38:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:43,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685290719] [2025-02-05 10:38:43,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:43,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:43,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 10:38:43,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 10:38:43,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:43,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685290719] [2025-02-05 10:38:43,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685290719] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989028493] [2025-02-05 10:38:43,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:43,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:43,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:43,820 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) [2025-02-05 10:38:43,821 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 [2025-02-05 10:38:43,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 10:38:43,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 10:38:43,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:43,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:43,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:38:43,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:43,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989028493] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:43,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:43,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-02-05 10:38:43,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646033005] [2025-02-05 10:38:43,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:43,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 10:38:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:43,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 10:38:43,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-02-05 10:38:43,966 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:38:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:44,089 INFO L93 Difference]: Finished difference Result 194 states and 273 transitions. [2025-02-05 10:38:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 10:38:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2025-02-05 10:38:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:44,091 INFO L225 Difference]: With dead ends: 194 [2025-02-05 10:38:44,091 INFO L226 Difference]: Without dead ends: 111 [2025-02-05 10:38:44,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:38:44,092 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 37 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:44,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 546 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-02-05 10:38:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2025-02-05 10:38:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 91 states have internal predecessors, (125), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 10:38:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 138 transitions. [2025-02-05 10:38:44,098 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 138 transitions. Word has length 50 [2025-02-05 10:38:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:44,098 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 138 transitions. [2025-02-05 10:38:44,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:38:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 138 transitions. [2025-02-05 10:38:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 10:38:44,099 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:44,099 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:44,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 10:38:44,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:44,300 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:44,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1321341142, now seen corresponding path program 1 times [2025-02-05 10:38:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:44,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567234557] [2025-02-05 10:38:44,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:44,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:44,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 10:38:44,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 10:38:44,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:44,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 10:38:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567234557] [2025-02-05 10:38:44,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567234557] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:44,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119023267] [2025-02-05 10:38:44,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:44,331 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) [2025-02-05 10:38:44,333 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 [2025-02-05 10:38:44,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 10:38:44,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 10:38:44,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:44,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:44,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-02-05 10:38:44,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 10:38:44,381 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:38:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119023267] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:44,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:38:44,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-02-05 10:38:44,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000384303] [2025-02-05 10:38:44,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:44,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:38:44,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:44,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:38:44,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:38:44,382 INFO L87 Difference]: Start difference. First operand 99 states and 138 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:44,412 INFO L93 Difference]: Finished difference Result 197 states and 279 transitions. [2025-02-05 10:38:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:38:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2025-02-05 10:38:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:44,413 INFO L225 Difference]: With dead ends: 197 [2025-02-05 10:38:44,413 INFO L226 Difference]: Without dead ends: 105 [2025-02-05 10:38:44,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:38:44,414 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:44,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-02-05 10:38:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2025-02-05 10:38:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 91 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 10:38:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2025-02-05 10:38:44,420 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 51 [2025-02-05 10:38:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:44,420 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2025-02-05 10:38:44,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2025-02-05 10:38:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-05 10:38:44,420 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:44,421 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:44,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:44,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 10:38:44,622 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:44,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1891769809, now seen corresponding path program 1 times [2025-02-05 10:38:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:44,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280709694] [2025-02-05 10:38:44,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:44,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:44,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-05 10:38:44,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-05 10:38:44,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:44,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 10:38:44,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280709694] [2025-02-05 10:38:44,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280709694] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371803463] [2025-02-05 10:38:44,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:44,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:44,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 10:38:44,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-05 10:38:44,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-05 10:38:44,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:44,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:44,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-05 10:38:44,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 10:38:44,804 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:38:44,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371803463] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:38:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-02-05 10:38:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861045098] [2025-02-05 10:38:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:44,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:38:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:44,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:38:44,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 10:38:44,805 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:44,877 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2025-02-05 10:38:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:38:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2025-02-05 10:38:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:44,878 INFO L225 Difference]: With dead ends: 197 [2025-02-05 10:38:44,878 INFO L226 Difference]: Without dead ends: 105 [2025-02-05 10:38:44,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 10:38:44,878 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:44,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-02-05 10:38:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2025-02-05 10:38:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 91 states have internal predecessors, (123), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 10:38:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 136 transitions. [2025-02-05 10:38:44,885 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 136 transitions. Word has length 52 [2025-02-05 10:38:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:44,885 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 136 transitions. [2025-02-05 10:38:44,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 136 transitions. [2025-02-05 10:38:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 10:38:44,886 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:44,886 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:44,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:45,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:45,091 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:45,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash -145129903, now seen corresponding path program 1 times [2025-02-05 10:38:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168859061] [2025-02-05 10:38:45,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:45,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-05 10:38:45,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-05 10:38:45,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:45,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:45,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:45,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168859061] [2025-02-05 10:38:45,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168859061] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:45,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:38:45,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 10:38:45,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850443205] [2025-02-05 10:38:45,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:45,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 10:38:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:45,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 10:38:45,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-05 10:38:45,271 INFO L87 Difference]: Start difference. First operand 99 states and 136 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:45,350 INFO L93 Difference]: Finished difference Result 180 states and 255 transitions. [2025-02-05 10:38:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 10:38:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2025-02-05 10:38:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:45,352 INFO L225 Difference]: With dead ends: 180 [2025-02-05 10:38:45,352 INFO L226 Difference]: Without dead ends: 143 [2025-02-05 10:38:45,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-05 10:38:45,352 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 49 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:45,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-02-05 10:38:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2025-02-05 10:38:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.353846153846154) internal successors, (176), 131 states have internal predecessors, (176), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2025-02-05 10:38:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 200 transitions. [2025-02-05 10:38:45,370 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 200 transitions. Word has length 53 [2025-02-05 10:38:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:45,370 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 200 transitions. [2025-02-05 10:38:45,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:38:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 200 transitions. [2025-02-05 10:38:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 10:38:45,371 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:45,371 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:45,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-05 10:38:45,373 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:45,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:45,373 INFO L85 PathProgramCache]: Analyzing trace with hash 545308437, now seen corresponding path program 1 times [2025-02-05 10:38:45,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:45,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200205014] [2025-02-05 10:38:45,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:45,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 10:38:45,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 10:38:45,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:45,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 10:38:45,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200205014] [2025-02-05 10:38:45,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200205014] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491921072] [2025-02-05 10:38:45,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:45,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:45,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:45,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:45,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 10:38:45,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 10:38:45,583 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 10:38:45,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:45,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:45,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 10:38:45,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:38:45,627 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:38:45,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491921072] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:45,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:38:45,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-02-05 10:38:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428436878] [2025-02-05 10:38:45,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:45,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 10:38:45,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:45,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 10:38:45,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:38:45,628 INFO L87 Difference]: Start difference. First operand 142 states and 200 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:45,668 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2025-02-05 10:38:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 10:38:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2025-02-05 10:38:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:45,670 INFO L225 Difference]: With dead ends: 163 [2025-02-05 10:38:45,670 INFO L226 Difference]: Without dead ends: 157 [2025-02-05 10:38:45,670 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:38:45,670 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:45,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 314 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-02-05 10:38:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2025-02-05 10:38:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 146 states have internal predecessors, (192), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2025-02-05 10:38:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 216 transitions. [2025-02-05 10:38:45,677 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 216 transitions. Word has length 55 [2025-02-05 10:38:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:45,678 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 216 transitions. [2025-02-05 10:38:45,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 216 transitions. [2025-02-05 10:38:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 10:38:45,678 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:45,678 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:45,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:45,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:45,879 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:45,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash 573937588, now seen corresponding path program 1 times [2025-02-05 10:38:45,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:45,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189421260] [2025-02-05 10:38:45,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:45,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 10:38:45,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 10:38:45,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:45,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:38:45,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:45,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189421260] [2025-02-05 10:38:45,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189421260] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:45,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:38:45,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 10:38:45,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687963097] [2025-02-05 10:38:45,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:45,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 10:38:45,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:45,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 10:38:45,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:45,971 INFO L87 Difference]: Start difference. First operand 157 states and 216 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:46,021 INFO L93 Difference]: Finished difference Result 163 states and 221 transitions. [2025-02-05 10:38:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 10:38:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2025-02-05 10:38:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:46,023 INFO L225 Difference]: With dead ends: 163 [2025-02-05 10:38:46,023 INFO L226 Difference]: Without dead ends: 146 [2025-02-05 10:38:46,023 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:38:46,023 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 1 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:46,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 413 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-02-05 10:38:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2025-02-05 10:38:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.3208955223880596) internal successors, (177), 136 states have internal predecessors, (177), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2025-02-05 10:38:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2025-02-05 10:38:46,031 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 55 [2025-02-05 10:38:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:46,031 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2025-02-05 10:38:46,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2025-02-05 10:38:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 10:38:46,032 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:46,033 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:46,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-05 10:38:46,033 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:46,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:46,033 INFO L85 PathProgramCache]: Analyzing trace with hash -322655125, now seen corresponding path program 1 times [2025-02-05 10:38:46,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:46,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645001119] [2025-02-05 10:38:46,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:46,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:46,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 10:38:46,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 10:38:46,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:46,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 10:38:46,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:46,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645001119] [2025-02-05 10:38:46,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645001119] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:46,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553460687] [2025-02-05 10:38:46,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:46,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:46,243 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:46,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 10:38:46,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 10:38:46,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 10:38:46,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:46,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:46,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-05 10:38:46,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 10:38:46,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-05 10:38:46,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553460687] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:46,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 10:38:46,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 13 [2025-02-05 10:38:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654916518] [2025-02-05 10:38:46,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:46,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 10:38:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:46,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 10:38:46,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:38:46,429 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:46,491 INFO L93 Difference]: Finished difference Result 162 states and 214 transitions. [2025-02-05 10:38:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 10:38:46,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2025-02-05 10:38:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:46,492 INFO L225 Difference]: With dead ends: 162 [2025-02-05 10:38:46,492 INFO L226 Difference]: Without dead ends: 150 [2025-02-05 10:38:46,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-02-05 10:38:46,493 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:46,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 230 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-02-05 10:38:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2025-02-05 10:38:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.3185185185185184) internal successors, (178), 137 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2025-02-05 10:38:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2025-02-05 10:38:46,501 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 57 [2025-02-05 10:38:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:46,501 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2025-02-05 10:38:46,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2025-02-05 10:38:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 10:38:46,503 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:46,503 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:46,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:46,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:46,707 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:46,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash -616058132, now seen corresponding path program 1 times [2025-02-05 10:38:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866025533] [2025-02-05 10:38:46,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:46,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:46,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 10:38:46,723 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 10:38:46,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:46,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866025533] [2025-02-05 10:38:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866025533] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648032624] [2025-02-05 10:38:46,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:46,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:46,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:46,816 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:46,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 10:38:46,851 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 10:38:46,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 10:38:46,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:46,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:46,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-05 10:38:46,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:38:47,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:38:47,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648032624] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:47,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:47,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 14] total 28 [2025-02-05 10:38:47,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590786970] [2025-02-05 10:38:47,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:47,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 10:38:47,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:47,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 10:38:47,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2025-02-05 10:38:47,439 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 24 states have internal predecessors, (92), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 10:38:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:48,782 INFO L93 Difference]: Finished difference Result 439 states and 636 transitions. [2025-02-05 10:38:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-05 10:38:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 24 states have internal predecessors, (92), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2025-02-05 10:38:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:48,784 INFO L225 Difference]: With dead ends: 439 [2025-02-05 10:38:48,784 INFO L226 Difference]: Without dead ends: 265 [2025-02-05 10:38:48,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2025-02-05 10:38:48,786 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 192 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:48,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 2050 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 10:38:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2025-02-05 10:38:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 157. [2025-02-05 10:38:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 145 states have internal predecessors, (185), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2025-02-05 10:38:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 221 transitions. [2025-02-05 10:38:48,804 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 221 transitions. Word has length 57 [2025-02-05 10:38:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:48,804 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 221 transitions. [2025-02-05 10:38:48,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 24 states have internal predecessors, (92), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 10:38:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 221 transitions. [2025-02-05 10:38:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-05 10:38:48,806 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:48,806 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:48,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:49,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-05 10:38:49,007 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:49,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:49,007 INFO L85 PathProgramCache]: Analyzing trace with hash 266807718, now seen corresponding path program 1 times [2025-02-05 10:38:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:49,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605936155] [2025-02-05 10:38:49,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:49,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-02-05 10:38:49,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-02-05 10:38:49,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:49,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:49,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605936155] [2025-02-05 10:38:49,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605936155] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889595011] [2025-02-05 10:38:49,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:49,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:49,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:49,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 10:38:49,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-02-05 10:38:49,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-02-05 10:38:49,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:49,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:49,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 10:38:49,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:49,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:49,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889595011] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:49,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:49,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-02-05 10:38:49,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470126611] [2025-02-05 10:38:49,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:49,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 10:38:49,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:49,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 10:38:49,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2025-02-05 10:38:49,481 INFO L87 Difference]: Start difference. First operand 157 states and 221 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:38:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:49,626 INFO L93 Difference]: Finished difference Result 383 states and 535 transitions. [2025-02-05 10:38:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-05 10:38:49,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2025-02-05 10:38:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:49,628 INFO L225 Difference]: With dead ends: 383 [2025-02-05 10:38:49,628 INFO L226 Difference]: Without dead ends: 237 [2025-02-05 10:38:49,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2025-02-05 10:38:49,629 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 151 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:49,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 548 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2025-02-05 10:38:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 175. [2025-02-05 10:38:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 160 states have (on average 1.34375) internal successors, (215), 163 states have internal predecessors, (215), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2025-02-05 10:38:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 251 transitions. [2025-02-05 10:38:49,655 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 251 transitions. Word has length 62 [2025-02-05 10:38:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:49,655 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 251 transitions. [2025-02-05 10:38:49,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:38:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 251 transitions. [2025-02-05 10:38:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-05 10:38:49,657 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:49,657 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:49,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:49,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-05 10:38:49,858 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:49,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash -478292207, now seen corresponding path program 1 times [2025-02-05 10:38:49,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:49,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511784394] [2025-02-05 10:38:49,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:49,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:49,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-05 10:38:49,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-05 10:38:49,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:49,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 10:38:49,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:49,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511784394] [2025-02-05 10:38:49,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511784394] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:38:49,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:38:49,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 10:38:49,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793745823] [2025-02-05 10:38:49,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:38:49,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 10:38:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:49,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 10:38:49,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:49,957 INFO L87 Difference]: Start difference. First operand 175 states and 251 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:50,007 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2025-02-05 10:38:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 10:38:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2025-02-05 10:38:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:50,009 INFO L225 Difference]: With dead ends: 204 [2025-02-05 10:38:50,009 INFO L226 Difference]: Without dead ends: 192 [2025-02-05 10:38:50,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:38:50,010 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:50,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 416 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:38:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-02-05 10:38:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2025-02-05 10:38:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 164 states have (on average 1.3414634146341464) internal successors, (220), 167 states have internal predecessors, (220), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2025-02-05 10:38:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 261 transitions. [2025-02-05 10:38:50,027 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 261 transitions. Word has length 64 [2025-02-05 10:38:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:50,028 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 261 transitions. [2025-02-05 10:38:50,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:38:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 261 transitions. [2025-02-05 10:38:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-02-05 10:38:50,029 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:50,029 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:50,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-05 10:38:50,030 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:50,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2029724235, now seen corresponding path program 2 times [2025-02-05 10:38:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:50,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846259897] [2025-02-05 10:38:50,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:38:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:50,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-02-05 10:38:50,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-02-05 10:38:50,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:38:50,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:50,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846259897] [2025-02-05 10:38:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846259897] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786698045] [2025-02-05 10:38:50,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:38:50,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:50,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:50,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 10:38:50,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-02-05 10:38:50,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-02-05 10:38:50,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:38:50,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:50,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-05 10:38:50,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 10:38:50,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:38:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786698045] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:51,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:51,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 17] total 40 [2025-02-05 10:38:51,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237134654] [2025-02-05 10:38:51,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:51,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-05 10:38:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:51,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-05 10:38:51,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 10:38:51,036 INFO L87 Difference]: Start difference. First operand 180 states and 261 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 36 states have internal predecessors, (123), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 10:38:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:54,605 INFO L93 Difference]: Finished difference Result 571 states and 887 transitions. [2025-02-05 10:38:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-02-05 10:38:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 36 states have internal predecessors, (123), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2025-02-05 10:38:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:54,607 INFO L225 Difference]: With dead ends: 571 [2025-02-05 10:38:54,607 INFO L226 Difference]: Without dead ends: 364 [2025-02-05 10:38:54,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1031, Invalid=7899, Unknown=0, NotChecked=0, Total=8930 [2025-02-05 10:38:54,615 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 468 mSDsluCounter, 4061 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 4205 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:54,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 4205 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-02-05 10:38:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2025-02-05 10:38:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 180. [2025-02-05 10:38:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 164 states have (on average 1.3414634146341464) internal successors, (220), 167 states have internal predecessors, (220), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2025-02-05 10:38:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 261 transitions. [2025-02-05 10:38:54,638 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 261 transitions. Word has length 66 [2025-02-05 10:38:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:54,638 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 261 transitions. [2025-02-05 10:38:54,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 36 states have internal predecessors, (123), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 10:38:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 261 transitions. [2025-02-05 10:38:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 10:38:54,639 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:54,639 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:54,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 10:38:54,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 10:38:54,840 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:54,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash 669077810, now seen corresponding path program 1 times [2025-02-05 10:38:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:54,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037370447] [2025-02-05 10:38:54,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:54,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 10:38:54,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 10:38:54,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:54,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 10:38:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037370447] [2025-02-05 10:38:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037370447] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484234762] [2025-02-05 10:38:54,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:54,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:54,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:54,990 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:54,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 10:38:55,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 10:38:55,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 10:38:55,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:55,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:55,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 10:38:55,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-05 10:38:55,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-05 10:38:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484234762] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:55,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:55,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2025-02-05 10:38:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303395392] [2025-02-05 10:38:55,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:55,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 10:38:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:55,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 10:38:55,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2025-02-05 10:38:55,761 INFO L87 Difference]: Start difference. First operand 180 states and 261 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 22 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 10:38:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:56,318 INFO L93 Difference]: Finished difference Result 373 states and 569 transitions. [2025-02-05 10:38:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 10:38:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 22 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 76 [2025-02-05 10:38:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:56,320 INFO L225 Difference]: With dead ends: 373 [2025-02-05 10:38:56,320 INFO L226 Difference]: Without dead ends: 266 [2025-02-05 10:38:56,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 10:38:56,321 INFO L435 NwaCegarLoop]: 119 mSDtfsCounter, 142 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:56,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2103 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 10:38:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2025-02-05 10:38:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2025-02-05 10:38:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 175 states have (on average 1.3142857142857143) internal successors, (230), 180 states have internal predecessors, (230), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (81), 14 states have call predecessors, (81), 12 states have call successors, (81) [2025-02-05 10:38:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 324 transitions. [2025-02-05 10:38:56,334 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 324 transitions. Word has length 76 [2025-02-05 10:38:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:56,335 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 324 transitions. [2025-02-05 10:38:56,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 22 states have internal predecessors, (90), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 10:38:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 324 transitions. [2025-02-05 10:38:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-05 10:38:56,336 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:56,336 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:56,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 10:38:56,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 10:38:56,540 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:56,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1442984843, now seen corresponding path program 1 times [2025-02-05 10:38:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:56,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154908264] [2025-02-05 10:38:56,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:56,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 10:38:56,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 10:38:56,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:56,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:56,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:56,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154908264] [2025-02-05 10:38:56,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154908264] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:56,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748638080] [2025-02-05 10:38:56,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:56,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:56,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:56,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 10:38:56,732 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 10:38:56,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 10:38:56,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:56,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:56,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:38:56,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:38:56,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:38:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748638080] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:56,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-02-05 10:38:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70095627] [2025-02-05 10:38:56,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:56,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 10:38:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:56,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 10:38:56,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2025-02-05 10:38:56,999 INFO L87 Difference]: Start difference. First operand 198 states and 324 transitions. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:38:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:57,599 INFO L93 Difference]: Finished difference Result 473 states and 756 transitions. [2025-02-05 10:38:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 10:38:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2025-02-05 10:38:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:57,606 INFO L225 Difference]: With dead ends: 473 [2025-02-05 10:38:57,609 INFO L226 Difference]: Without dead ends: 292 [2025-02-05 10:38:57,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2025-02-05 10:38:57,611 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 209 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:57,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 852 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 10:38:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2025-02-05 10:38:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 207. [2025-02-05 10:38:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 184 states have (on average 1.3206521739130435) internal successors, (243), 189 states have internal predecessors, (243), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (81), 14 states have call predecessors, (81), 12 states have call successors, (81) [2025-02-05 10:38:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 337 transitions. [2025-02-05 10:38:57,651 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 337 transitions. Word has length 77 [2025-02-05 10:38:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:57,651 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 337 transitions. [2025-02-05 10:38:57,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:38:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 337 transitions. [2025-02-05 10:38:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-02-05 10:38:57,652 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:57,652 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:57,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:57,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:57,858 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:57,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:57,859 INFO L85 PathProgramCache]: Analyzing trace with hash -821852, now seen corresponding path program 1 times [2025-02-05 10:38:57,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:57,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013179073] [2025-02-05 10:38:57,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:57,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:57,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-02-05 10:38:57,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-02-05 10:38:57,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:57,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 10:38:58,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013179073] [2025-02-05 10:38:58,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013179073] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:58,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107803535] [2025-02-05 10:38:58,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:38:58,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:58,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:58,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 10:38:58,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 78 statements into 1 equivalence classes. [2025-02-05 10:38:58,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 78 of 78 statements. [2025-02-05 10:38:58,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:38:58,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:58,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 10:38:58,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:38:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 10:38:58,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:38:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-05 10:38:58,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107803535] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:38:58,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:38:58,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-02-05 10:38:58,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730005312] [2025-02-05 10:38:58,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:38:58,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 10:38:58,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:38:58,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 10:38:58,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2025-02-05 10:38:58,302 INFO L87 Difference]: Start difference. First operand 207 states and 337 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 10:38:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:38:58,439 INFO L93 Difference]: Finished difference Result 214 states and 343 transitions. [2025-02-05 10:38:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 10:38:58,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 78 [2025-02-05 10:38:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:38:58,443 INFO L225 Difference]: With dead ends: 214 [2025-02-05 10:38:58,443 INFO L226 Difference]: Without dead ends: 171 [2025-02-05 10:38:58,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-05 10:38:58,444 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:38:58,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 802 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:38:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-02-05 10:38:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2025-02-05 10:38:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 156 states have internal predecessors, (199), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (58), 11 states have call predecessors, (58), 10 states have call successors, (58) [2025-02-05 10:38:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 268 transitions. [2025-02-05 10:38:58,459 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 268 transitions. Word has length 78 [2025-02-05 10:38:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:38:58,459 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 268 transitions. [2025-02-05 10:38:58,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 10:38:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 268 transitions. [2025-02-05 10:38:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-02-05 10:38:58,461 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:38:58,461 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:38:58,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 10:38:58,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:58,662 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:38:58,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:38:58,662 INFO L85 PathProgramCache]: Analyzing trace with hash -446322971, now seen corresponding path program 3 times [2025-02-05 10:38:58,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:38:58,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704941539] [2025-02-05 10:38:58,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:38:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:38:58,671 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 79 statements into 8 equivalence classes. [2025-02-05 10:38:58,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 79 of 79 statements. [2025-02-05 10:38:58,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-05 10:38:58,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 57 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 10:38:59,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:38:59,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704941539] [2025-02-05 10:38:59,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704941539] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:38:59,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171448825] [2025-02-05 10:38:59,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:38:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:38:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:38:59,711 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:38:59,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 10:38:59,745 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 79 statements into 8 equivalence classes. [2025-02-05 10:38:59,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 79 of 79 statements. [2025-02-05 10:38:59,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-05 10:38:59,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:38:59,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-05 10:38:59,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-05 10:39:00,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171448825] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:01,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:01,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 17] total 54 [2025-02-05 10:39:01,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729907450] [2025-02-05 10:39:01,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:01,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-02-05 10:39:01,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:01,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-02-05 10:39:01,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2630, Unknown=0, NotChecked=0, Total=2862 [2025-02-05 10:39:01,360 INFO L87 Difference]: Start difference. First operand 171 states and 268 transitions. Second operand has 54 states, 54 states have (on average 2.759259259259259) internal successors, (149), 48 states have internal predecessors, (149), 6 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 10:39:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:04,374 INFO L93 Difference]: Finished difference Result 527 states and 816 transitions. [2025-02-05 10:39:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-02-05 10:39:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.759259259259259) internal successors, (149), 48 states have internal predecessors, (149), 6 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) Word has length 79 [2025-02-05 10:39:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:04,376 INFO L225 Difference]: With dead ends: 527 [2025-02-05 10:39:04,376 INFO L226 Difference]: Without dead ends: 366 [2025-02-05 10:39:04,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=920, Invalid=8980, Unknown=0, NotChecked=0, Total=9900 [2025-02-05 10:39:04,379 INFO L435 NwaCegarLoop]: 128 mSDtfsCounter, 605 mSDsluCounter, 3370 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:04,379 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 3498 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-05 10:39:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2025-02-05 10:39:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 181. [2025-02-05 10:39:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 164 states have internal predecessors, (207), 13 states have call successors, (13), 3 states have call predecessors, (13), 10 states have return successors, (83), 13 states have call predecessors, (83), 12 states have call successors, (83) [2025-02-05 10:39:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 303 transitions. [2025-02-05 10:39:04,394 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 303 transitions. Word has length 79 [2025-02-05 10:39:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:04,394 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 303 transitions. [2025-02-05 10:39:04,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.759259259259259) internal successors, (149), 48 states have internal predecessors, (149), 6 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 10:39:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 303 transitions. [2025-02-05 10:39:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-05 10:39:04,396 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:04,396 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:04,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-05 10:39:04,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:04,597 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:04,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash -889864536, now seen corresponding path program 1 times [2025-02-05 10:39:04,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:04,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329577176] [2025-02-05 10:39:04,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:04,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:04,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 10:39:04,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 10:39:04,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:04,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-05 10:39:04,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329577176] [2025-02-05 10:39:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329577176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44042355] [2025-02-05 10:39:04,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:04,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:04,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 10:39:04,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 10:39:04,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 10:39:04,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:04,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:04,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:39:04,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-05 10:39:04,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 10:39:04,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44042355] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:04,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 10:39:04,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 9] total 13 [2025-02-05 10:39:04,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524511111] [2025-02-05 10:39:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:04,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 10:39:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:04,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 10:39:04,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:39:04,833 INFO L87 Difference]: Start difference. First operand 181 states and 303 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:04,876 INFO L93 Difference]: Finished difference Result 193 states and 315 transitions. [2025-02-05 10:39:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 10:39:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2025-02-05 10:39:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:04,878 INFO L225 Difference]: With dead ends: 193 [2025-02-05 10:39:04,878 INFO L226 Difference]: Without dead ends: 188 [2025-02-05 10:39:04,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:39:04,879 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:04,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 321 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:39:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-02-05 10:39:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2025-02-05 10:39:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 171 states have internal predecessors, (214), 13 states have call successors, (13), 3 states have call predecessors, (13), 10 states have return successors, (83), 13 states have call predecessors, (83), 12 states have call successors, (83) [2025-02-05 10:39:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 310 transitions. [2025-02-05 10:39:04,902 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 310 transitions. Word has length 80 [2025-02-05 10:39:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:04,903 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 310 transitions. [2025-02-05 10:39:04,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 310 transitions. [2025-02-05 10:39:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 10:39:04,904 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:04,904 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:04,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-05 10:39:05,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:05,105 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:05,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2118961923, now seen corresponding path program 1 times [2025-02-05 10:39:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:05,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900331020] [2025-02-05 10:39:05,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:05,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 10:39:05,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 10:39:05,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:05,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-05 10:39:05,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:05,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900331020] [2025-02-05 10:39:05,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900331020] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:05,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158475936] [2025-02-05 10:39:05,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:05,196 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:05,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 10:39:05,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 10:39:05,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 10:39:05,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:05,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:05,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 10:39:05,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-05 10:39:05,283 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:39:05,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158475936] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:39:05,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:39:05,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 9 [2025-02-05 10:39:05,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684471323] [2025-02-05 10:39:05,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:05,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 10:39:05,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:05,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 10:39:05,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 10:39:05,284 INFO L87 Difference]: Start difference. First operand 188 states and 310 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:39:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:05,357 INFO L93 Difference]: Finished difference Result 302 states and 492 transitions. [2025-02-05 10:39:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 10:39:05,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2025-02-05 10:39:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:05,359 INFO L225 Difference]: With dead ends: 302 [2025-02-05 10:39:05,359 INFO L226 Difference]: Without dead ends: 243 [2025-02-05 10:39:05,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-05 10:39:05,360 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:05,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 520 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:39:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-02-05 10:39:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2025-02-05 10:39:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 199 states have (on average 1.306532663316583) internal successors, (260), 203 states have internal predecessors, (260), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 21 states have call predecessors, (124), 17 states have call successors, (124) [2025-02-05 10:39:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 402 transitions. [2025-02-05 10:39:05,375 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 402 transitions. Word has length 81 [2025-02-05 10:39:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:05,375 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 402 transitions. [2025-02-05 10:39:05,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:39:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 402 transitions. [2025-02-05 10:39:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 10:39:05,377 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:05,377 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:05,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 10:39:05,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:05,581 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:05,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1274490052, now seen corresponding path program 1 times [2025-02-05 10:39:05,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:05,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965950732] [2025-02-05 10:39:05,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:05,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:05,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 10:39:05,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 10:39:05,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:05,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-05 10:39:05,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965950732] [2025-02-05 10:39:05,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965950732] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161325758] [2025-02-05 10:39:05,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:05,828 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 10:39:05,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 10:39:05,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 10:39:05,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:05,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:05,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 10:39:05,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-05 10:39:06,039 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:39:06,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161325758] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:39:06,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:39:06,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 13 [2025-02-05 10:39:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672530448] [2025-02-05 10:39:06,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:06,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 10:39:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:06,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 10:39:06,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:39:06,040 INFO L87 Difference]: Start difference. First operand 228 states and 402 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:39:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:06,208 INFO L93 Difference]: Finished difference Result 270 states and 451 transitions. [2025-02-05 10:39:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 10:39:06,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2025-02-05 10:39:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:06,212 INFO L225 Difference]: With dead ends: 270 [2025-02-05 10:39:06,212 INFO L226 Difference]: Without dead ends: 243 [2025-02-05 10:39:06,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2025-02-05 10:39:06,213 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 46 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:06,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 624 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:39:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-02-05 10:39:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 234. [2025-02-05 10:39:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 205 states have (on average 1.302439024390244) internal successors, (267), 209 states have internal predecessors, (267), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (124), 21 states have call predecessors, (124), 17 states have call successors, (124) [2025-02-05 10:39:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 409 transitions. [2025-02-05 10:39:06,231 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 409 transitions. Word has length 81 [2025-02-05 10:39:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:06,231 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 409 transitions. [2025-02-05 10:39:06,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:39:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 409 transitions. [2025-02-05 10:39:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-02-05 10:39:06,233 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:06,233 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:06,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-05 10:39:06,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:06,433 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:06,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -615322665, now seen corresponding path program 1 times [2025-02-05 10:39:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:06,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044939306] [2025-02-05 10:39:06,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:06,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:06,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-05 10:39:06,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-05 10:39:06,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:06,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 10:39:06,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:06,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044939306] [2025-02-05 10:39:06,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044939306] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:06,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670378436] [2025-02-05 10:39:06,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:06,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:06,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:06,631 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:06,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-05 10:39:06,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-05 10:39:06,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-05 10:39:06,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:06,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:06,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 10:39:06,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-05 10:39:06,934 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:39:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670378436] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:39:06,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:39:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2025-02-05 10:39:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445683649] [2025-02-05 10:39:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:06,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 10:39:06,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:06,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 10:39:06,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2025-02-05 10:39:06,935 INFO L87 Difference]: Start difference. First operand 234 states and 409 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:39:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:07,087 INFO L93 Difference]: Finished difference Result 270 states and 450 transitions. [2025-02-05 10:39:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 10:39:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 83 [2025-02-05 10:39:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:07,089 INFO L225 Difference]: With dead ends: 270 [2025-02-05 10:39:07,089 INFO L226 Difference]: Without dead ends: 233 [2025-02-05 10:39:07,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2025-02-05 10:39:07,089 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 44 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:07,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 813 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:39:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-02-05 10:39:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 222. [2025-02-05 10:39:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 195 states have (on average 1.3128205128205128) internal successors, (256), 200 states have internal predecessors, (256), 16 states have call successors, (16), 3 states have call predecessors, (16), 10 states have return successors, (107), 18 states have call predecessors, (107), 15 states have call successors, (107) [2025-02-05 10:39:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 379 transitions. [2025-02-05 10:39:07,109 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 379 transitions. Word has length 83 [2025-02-05 10:39:07,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:07,109 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 379 transitions. [2025-02-05 10:39:07,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 10:39:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 379 transitions. [2025-02-05 10:39:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-05 10:39:07,114 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:07,114 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:07,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-05 10:39:07,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:07,314 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:07,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:07,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1718479927, now seen corresponding path program 1 times [2025-02-05 10:39:07,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:07,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667013002] [2025-02-05 10:39:07,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:07,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:07,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-05 10:39:07,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-05 10:39:07,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:07,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-05 10:39:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667013002] [2025-02-05 10:39:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667013002] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954349856] [2025-02-05 10:39:07,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:07,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:07,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:07,415 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:07,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-05 10:39:07,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-05 10:39:07,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-05 10:39:07,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:07,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:07,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 10:39:07,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-05 10:39:07,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-05 10:39:07,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954349856] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:07,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:07,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2025-02-05 10:39:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35658162] [2025-02-05 10:39:07,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:07,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 10:39:07,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:07,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 10:39:07,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:39:07,622 INFO L87 Difference]: Start difference. First operand 222 states and 379 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 10:39:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:07,704 INFO L93 Difference]: Finished difference Result 266 states and 430 transitions. [2025-02-05 10:39:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 10:39:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 85 [2025-02-05 10:39:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:07,706 INFO L225 Difference]: With dead ends: 266 [2025-02-05 10:39:07,707 INFO L226 Difference]: Without dead ends: 231 [2025-02-05 10:39:07,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-02-05 10:39:07,708 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 47 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:07,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 723 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:39:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-02-05 10:39:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 222. [2025-02-05 10:39:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 195 states have (on average 1.3025641025641026) internal successors, (254), 200 states have internal predecessors, (254), 16 states have call successors, (16), 3 states have call predecessors, (16), 10 states have return successors, (107), 18 states have call predecessors, (107), 15 states have call successors, (107) [2025-02-05 10:39:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 377 transitions. [2025-02-05 10:39:07,723 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 377 transitions. Word has length 85 [2025-02-05 10:39:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:07,723 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 377 transitions. [2025-02-05 10:39:07,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 10:39:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 377 transitions. [2025-02-05 10:39:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-05 10:39:07,725 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:07,726 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:07,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-05 10:39:07,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-05 10:39:07,931 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:07,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1732015498, now seen corresponding path program 1 times [2025-02-05 10:39:07,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:07,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987667277] [2025-02-05 10:39:07,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:07,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:07,936 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-05 10:39:07,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-05 10:39:07,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:07,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:08,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987667277] [2025-02-05 10:39:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987667277] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720797535] [2025-02-05 10:39:08,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:08,098 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:08,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-05 10:39:08,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-05 10:39:08,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-05 10:39:08,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:08,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:08,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:39:08,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-05 10:39:08,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-05 10:39:08,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720797535] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:08,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:08,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2025-02-05 10:39:08,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582331430] [2025-02-05 10:39:08,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:08,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-05 10:39:08,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:08,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-05 10:39:08,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2025-02-05 10:39:08,498 INFO L87 Difference]: Start difference. First operand 222 states and 377 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 20 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-05 10:39:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:08,950 INFO L93 Difference]: Finished difference Result 467 states and 771 transitions. [2025-02-05 10:39:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-05 10:39:08,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 20 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 85 [2025-02-05 10:39:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:08,952 INFO L225 Difference]: With dead ends: 467 [2025-02-05 10:39:08,952 INFO L226 Difference]: Without dead ends: 274 [2025-02-05 10:39:08,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 10:39:08,954 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 118 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:08,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1197 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 10:39:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-02-05 10:39:08,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 222. [2025-02-05 10:39:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 195 states have (on average 1.2974358974358975) internal successors, (253), 200 states have internal predecessors, (253), 16 states have call successors, (16), 3 states have call predecessors, (16), 10 states have return successors, (107), 18 states have call predecessors, (107), 15 states have call successors, (107) [2025-02-05 10:39:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 376 transitions. [2025-02-05 10:39:08,988 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 376 transitions. Word has length 85 [2025-02-05 10:39:08,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:08,991 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 376 transitions. [2025-02-05 10:39:08,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 20 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-05 10:39:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 376 transitions. [2025-02-05 10:39:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-05 10:39:08,993 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:08,993 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:09,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-05 10:39:09,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-05 10:39:09,193 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:09,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash -814425306, now seen corresponding path program 2 times [2025-02-05 10:39:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218249753] [2025-02-05 10:39:09,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:39:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:09,201 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-05 10:39:09,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-05 10:39:09,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:39:09,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:39:09,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218249753] [2025-02-05 10:39:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218249753] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156613301] [2025-02-05 10:39:09,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:39:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:09,418 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:09,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-05 10:39:09,451 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-05 10:39:09,470 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-05 10:39:09,471 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:39:09,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:09,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:39:09,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 10:39:09,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:39:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156613301] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:09,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:09,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2025-02-05 10:39:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863977522] [2025-02-05 10:39:09,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:09,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-05 10:39:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:09,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-05 10:39:10,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=1236, Unknown=0, NotChecked=0, Total=1892 [2025-02-05 10:39:10,001 INFO L87 Difference]: Start difference. First operand 222 states and 376 transitions. Second operand has 44 states, 44 states have (on average 3.75) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:39:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:10,215 INFO L93 Difference]: Finished difference Result 623 states and 938 transitions. [2025-02-05 10:39:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-05 10:39:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.75) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2025-02-05 10:39:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:10,218 INFO L225 Difference]: With dead ends: 623 [2025-02-05 10:39:10,218 INFO L226 Difference]: Without dead ends: 433 [2025-02-05 10:39:10,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=697, Invalid=1283, Unknown=0, NotChecked=0, Total=1980 [2025-02-05 10:39:10,220 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 1075 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:10,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 587 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:39:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2025-02-05 10:39:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 264. [2025-02-05 10:39:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 237 states have (on average 1.3628691983122363) internal successors, (323), 242 states have internal predecessors, (323), 16 states have call successors, (16), 3 states have call predecessors, (16), 10 states have return successors, (107), 18 states have call predecessors, (107), 15 states have call successors, (107) [2025-02-05 10:39:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 446 transitions. [2025-02-05 10:39:10,241 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 446 transitions. Word has length 86 [2025-02-05 10:39:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:10,241 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 446 transitions. [2025-02-05 10:39:10,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.75) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:39:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 446 transitions. [2025-02-05 10:39:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-05 10:39:10,243 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:10,243 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:10,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-05 10:39:10,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-05 10:39:10,445 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:10,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1867781067, now seen corresponding path program 4 times [2025-02-05 10:39:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135317598] [2025-02-05 10:39:10,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:39:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:10,457 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-05 10:39:10,478 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-02-05 10:39:10,478 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:39:10,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 4 proven. 207 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 10:39:10,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135317598] [2025-02-05 10:39:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135317598] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577923080] [2025-02-05 10:39:10,821 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:39:10,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:10,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:10,824 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:10,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-05 10:39:10,859 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-05 10:39:10,881 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-02-05 10:39:10,881 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 10:39:10,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:10,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-05 10:39:10,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 10 proven. 207 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:39:11,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 10 proven. 207 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 10:39:12,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577923080] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:12,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:12,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 25] total 63 [2025-02-05 10:39:12,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138311912] [2025-02-05 10:39:12,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:12,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2025-02-05 10:39:12,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:12,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2025-02-05 10:39:12,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2025-02-05 10:39:12,718 INFO L87 Difference]: Start difference. First operand 264 states and 446 transitions. Second operand has 63 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 59 states have internal predecessors, (191), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 10:39:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:22,909 INFO L93 Difference]: Finished difference Result 926 states and 1631 transitions. [2025-02-05 10:39:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2025-02-05 10:39:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 59 states have internal predecessors, (191), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 90 [2025-02-05 10:39:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:22,913 INFO L225 Difference]: With dead ends: 926 [2025-02-05 10:39:22,913 INFO L226 Difference]: Without dead ends: 611 [2025-02-05 10:39:22,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5185 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3545, Invalid=19407, Unknown=0, NotChecked=0, Total=22952 [2025-02-05 10:39:22,921 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 1817 mSDsluCounter, 4918 mSDsCounter, 0 mSdLazyCounter, 9236 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1827 SdHoareTripleChecker+Valid, 5049 SdHoareTripleChecker+Invalid, 10062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 9236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:22,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1827 Valid, 5049 Invalid, 10062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 9236 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2025-02-05 10:39:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2025-02-05 10:39:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 273. [2025-02-05 10:39:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 243 states have (on average 1.3580246913580247) internal successors, (330), 249 states have internal predecessors, (330), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (131), 20 states have call predecessors, (131), 17 states have call successors, (131) [2025-02-05 10:39:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 479 transitions. [2025-02-05 10:39:22,962 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 479 transitions. Word has length 90 [2025-02-05 10:39:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:22,963 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 479 transitions. [2025-02-05 10:39:22,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 59 states have internal predecessors, (191), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-05 10:39:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 479 transitions. [2025-02-05 10:39:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-05 10:39:22,965 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:22,965 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:22,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-05 10:39:23,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-05 10:39:23,166 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:23,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash -138419593, now seen corresponding path program 1 times [2025-02-05 10:39:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:23,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718354034] [2025-02-05 10:39:23,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:23,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 90 statements into 1 equivalence classes. [2025-02-05 10:39:23,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 90 of 90 statements. [2025-02-05 10:39:23,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:23,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:23,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:23,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718354034] [2025-02-05 10:39:23,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718354034] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:23,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72456100] [2025-02-05 10:39:23,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:23,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:23,369 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:23,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-05 10:39:23,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 90 statements into 1 equivalence classes. [2025-02-05 10:39:23,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 90 of 90 statements. [2025-02-05 10:39:23,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:23,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:23,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 10:39:23,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-05 10:39:24,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-05 10:39:24,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72456100] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:24,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:24,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2025-02-05 10:39:24,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298312850] [2025-02-05 10:39:24,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:24,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 10:39:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:24,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 10:39:24,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2025-02-05 10:39:24,394 INFO L87 Difference]: Start difference. First operand 273 states and 479 transitions. Second operand has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 25 states have internal predecessors, (106), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-05 10:39:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:25,181 INFO L93 Difference]: Finished difference Result 585 states and 976 transitions. [2025-02-05 10:39:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 10:39:25,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 25 states have internal predecessors, (106), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 90 [2025-02-05 10:39:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:25,187 INFO L225 Difference]: With dead ends: 585 [2025-02-05 10:39:25,187 INFO L226 Difference]: Without dead ends: 345 [2025-02-05 10:39:25,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 10:39:25,192 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 292 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:25,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1176 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 10:39:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2025-02-05 10:39:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 273. [2025-02-05 10:39:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 243 states have (on average 1.353909465020576) internal successors, (329), 249 states have internal predecessors, (329), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (131), 20 states have call predecessors, (131), 17 states have call successors, (131) [2025-02-05 10:39:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 478 transitions. [2025-02-05 10:39:25,234 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 478 transitions. Word has length 90 [2025-02-05 10:39:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:25,234 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 478 transitions. [2025-02-05 10:39:25,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 25 states have internal predecessors, (106), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-05 10:39:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 478 transitions. [2025-02-05 10:39:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-05 10:39:25,236 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:25,236 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:25,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-05 10:39:25,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:25,440 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:25,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash -410373264, now seen corresponding path program 1 times [2025-02-05 10:39:25,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:25,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415822309] [2025-02-05 10:39:25,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:25,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:25,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-02-05 10:39:25,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-02-05 10:39:25,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:25,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415822309] [2025-02-05 10:39:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415822309] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054513766] [2025-02-05 10:39:25,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:25,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:25,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:25,651 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:25,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-05 10:39:25,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-02-05 10:39:26,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-02-05 10:39:26,088 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:26,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:26,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 10:39:26,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2025-02-05 10:39:26,162 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:39:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054513766] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:39:26,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:39:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2025-02-05 10:39:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020311040] [2025-02-05 10:39:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:26,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 10:39:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:26,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 10:39:26,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-02-05 10:39:26,164 INFO L87 Difference]: Start difference. First operand 273 states and 478 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:26,250 INFO L93 Difference]: Finished difference Result 331 states and 549 transitions. [2025-02-05 10:39:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 10:39:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 93 [2025-02-05 10:39:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:26,253 INFO L225 Difference]: With dead ends: 331 [2025-02-05 10:39:26,253 INFO L226 Difference]: Without dead ends: 284 [2025-02-05 10:39:26,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-02-05 10:39:26,253 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:26,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 592 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:39:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2025-02-05 10:39:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 277. [2025-02-05 10:39:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 247 states have (on average 1.3522267206477734) internal successors, (334), 252 states have internal predecessors, (334), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (131), 21 states have call predecessors, (131), 17 states have call successors, (131) [2025-02-05 10:39:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 483 transitions. [2025-02-05 10:39:26,275 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 483 transitions. Word has length 93 [2025-02-05 10:39:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:26,276 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 483 transitions. [2025-02-05 10:39:26,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 483 transitions. [2025-02-05 10:39:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-05 10:39:26,280 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:26,280 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:26,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-02-05 10:39:26,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:26,481 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:26,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1254845135, now seen corresponding path program 1 times [2025-02-05 10:39:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164537419] [2025-02-05 10:39:26,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:26,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-02-05 10:39:26,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-02-05 10:39:26,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:26,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:26,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164537419] [2025-02-05 10:39:26,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164537419] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:26,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734546843] [2025-02-05 10:39:26,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:26,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:26,674 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:26,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-05 10:39:26,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-02-05 10:39:27,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-02-05 10:39:27,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:27,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:27,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:39:27,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2025-02-05 10:39:27,090 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 10:39:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734546843] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:39:27,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 10:39:27,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2025-02-05 10:39:27,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947243473] [2025-02-05 10:39:27,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:27,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 10:39:27,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:27,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 10:39:27,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-02-05 10:39:27,092 INFO L87 Difference]: Start difference. First operand 277 states and 483 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:27,171 INFO L93 Difference]: Finished difference Result 328 states and 545 transitions. [2025-02-05 10:39:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 10:39:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 93 [2025-02-05 10:39:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:27,173 INFO L225 Difference]: With dead ends: 328 [2025-02-05 10:39:27,173 INFO L226 Difference]: Without dead ends: 285 [2025-02-05 10:39:27,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-02-05 10:39:27,175 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 5 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:27,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 517 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:39:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2025-02-05 10:39:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2025-02-05 10:39:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 253 states have (on average 1.3478260869565217) internal successors, (341), 258 states have internal predecessors, (341), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (131), 21 states have call predecessors, (131), 17 states have call successors, (131) [2025-02-05 10:39:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 490 transitions. [2025-02-05 10:39:27,200 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 490 transitions. Word has length 93 [2025-02-05 10:39:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:27,200 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 490 transitions. [2025-02-05 10:39:27,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 490 transitions. [2025-02-05 10:39:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-02-05 10:39:27,202 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:27,202 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:27,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-05 10:39:27,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-02-05 10:39:27,406 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:27,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1092286434, now seen corresponding path program 1 times [2025-02-05 10:39:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:27,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600122685] [2025-02-05 10:39:27,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:27,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-02-05 10:39:27,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-02-05 10:39:27,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:27,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600122685] [2025-02-05 10:39:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600122685] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296840175] [2025-02-05 10:39:27,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:27,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:27,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:27,595 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:27,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-05 10:39:27,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-02-05 10:39:28,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-02-05 10:39:28,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:28,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:28,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-05 10:39:28,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 42 proven. 5 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-05 10:39:28,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2025-02-05 10:39:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296840175] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:29,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 10:39:29,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12, 18] total 36 [2025-02-05 10:39:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006296337] [2025-02-05 10:39:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:39:29,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 10:39:29,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:29,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 10:39:29,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 10:39:29,239 INFO L87 Difference]: Start difference. First operand 283 states and 490 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:29,488 INFO L93 Difference]: Finished difference Result 306 states and 515 transitions. [2025-02-05 10:39:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 10:39:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 95 [2025-02-05 10:39:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:29,490 INFO L225 Difference]: With dead ends: 306 [2025-02-05 10:39:29,490 INFO L226 Difference]: Without dead ends: 294 [2025-02-05 10:39:29,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 10:39:29,491 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 28 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:29,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 702 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:39:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2025-02-05 10:39:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2025-02-05 10:39:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 267 states have internal predecessors, (352), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (131), 21 states have call predecessors, (131), 17 states have call successors, (131) [2025-02-05 10:39:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 501 transitions. [2025-02-05 10:39:29,512 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 501 transitions. Word has length 95 [2025-02-05 10:39:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:29,513 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 501 transitions. [2025-02-05 10:39:29,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 10:39:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 501 transitions. [2025-02-05 10:39:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-02-05 10:39:29,514 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:29,514 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:29,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-05 10:39:29,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:29,719 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:29,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash -157138512, now seen corresponding path program 1 times [2025-02-05 10:39:29,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378127092] [2025-02-05 10:39:29,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:29,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:29,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-02-05 10:39:29,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-02-05 10:39:29,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:29,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378127092] [2025-02-05 10:39:29,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378127092] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130969961] [2025-02-05 10:39:29,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:39:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:29,925 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:29,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-05 10:39:29,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-02-05 10:39:30,345 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-02-05 10:39:30,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:39:30,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:30,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 10:39:30,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 53 proven. 63 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 10:39:30,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130969961] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:31,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:31,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2025-02-05 10:39:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823286590] [2025-02-05 10:39:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:31,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-05 10:39:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:31,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-05 10:39:31,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2025-02-05 10:39:31,689 INFO L87 Difference]: Start difference. First operand 292 states and 501 transitions. Second operand has 31 states, 31 states have (on average 5.129032258064516) internal successors, (159), 31 states have internal predecessors, (159), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:39:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:39:33,293 INFO L93 Difference]: Finished difference Result 670 states and 1137 transitions. [2025-02-05 10:39:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-05 10:39:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.129032258064516) internal successors, (159), 31 states have internal predecessors, (159), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2025-02-05 10:39:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:39:33,295 INFO L225 Difference]: With dead ends: 670 [2025-02-05 10:39:33,295 INFO L226 Difference]: Without dead ends: 395 [2025-02-05 10:39:33,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=682, Invalid=1388, Unknown=0, NotChecked=0, Total=2070 [2025-02-05 10:39:33,305 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 306 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 10:39:33,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1268 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 10:39:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2025-02-05 10:39:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 278. [2025-02-05 10:39:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 251 states have (on average 1.350597609561753) internal successors, (339), 255 states have internal predecessors, (339), 16 states have call successors, (16), 3 states have call predecessors, (16), 10 states have return successors, (102), 19 states have call predecessors, (102), 15 states have call successors, (102) [2025-02-05 10:39:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 457 transitions. [2025-02-05 10:39:33,332 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 457 transitions. Word has length 96 [2025-02-05 10:39:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:39:33,332 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 457 transitions. [2025-02-05 10:39:33,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.129032258064516) internal successors, (159), 31 states have internal predecessors, (159), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 10:39:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 457 transitions. [2025-02-05 10:39:33,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-02-05 10:39:33,333 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:39:33,333 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 15, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:39:33,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-05 10:39:33,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:33,534 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:39:33,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:39:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -484538748, now seen corresponding path program 5 times [2025-02-05 10:39:33,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:39:33,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385453126] [2025-02-05 10:39:33,535 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:39:33,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:39:33,543 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 112 statements into 19 equivalence classes. [2025-02-05 10:39:33,575 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 62 of 112 statements. [2025-02-05 10:39:33,576 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-05 10:39:33,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 4 proven. 424 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:39:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385453126] [2025-02-05 10:39:33,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385453126] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:39:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843034624] [2025-02-05 10:39:33,944 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:39:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:39:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:39:33,946 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:39:33,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-05 10:39:33,991 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 112 statements into 19 equivalence classes. [2025-02-05 10:39:34,341 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 62 of 112 statements. [2025-02-05 10:39:34,342 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-02-05 10:39:34,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:39:34,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-02-05 10:39:34,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:39:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 80 proven. 360 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 10:39:37,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:39:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 4 proven. 424 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 10:39:51,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843034624] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:39:51,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:39:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38, 37] total 90 [2025-02-05 10:39:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813825165] [2025-02-05 10:39:51,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:39:51,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-02-05 10:39:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:39:51,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-02-05 10:39:51,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=6055, Unknown=0, NotChecked=0, Total=8010 [2025-02-05 10:39:51,485 INFO L87 Difference]: Start difference. First operand 278 states and 457 transitions. Second operand has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 10:40:04,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []