./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de32.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 be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:19:04,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:19:04,739 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:19:04,742 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:19:04,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:19:04,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:19:04,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:19:04,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:19:04,766 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:19:04,766 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:19:04,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:19:04,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:19:04,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:19:04,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:19:04,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:19:04,769 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:19:04,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:19:04,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:19:04,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:19:04,770 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 -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 [2025-02-07 20:19:05,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:19:05,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:19:05,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:19:05,029 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:19:05,029 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:19:05,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2025-02-07 20:19:06,067 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f461e6f8/2a374fa910664db98b905972aec3a0a9/FLAG275dd7b8b [2025-02-07 20:19:06,273 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:19:06,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c [2025-02-07 20:19:06,280 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f461e6f8/2a374fa910664db98b905972aec3a0a9/FLAG275dd7b8b [2025-02-07 20:19:06,622 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0f461e6f8/2a374fa910664db98b905972aec3a0a9 [2025-02-07 20:19:06,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:19:06,625 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:19:06,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:19:06,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:19:06,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:19:06,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125a143e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06, skipping insertion in model container [2025-02-07 20:19:06,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,638 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:19:06,725 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/loops-crafted-1/in-de32.c[368,381] [2025-02-07 20:19:06,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:19:06,741 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:19:06,748 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/loops-crafted-1/in-de32.c[368,381] [2025-02-07 20:19:06,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:19:06,760 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:19:06,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06 WrapperNode [2025-02-07 20:19:06,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:19:06,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:19:06,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:19:06,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:19:06,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,779 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2025-02-07 20:19:06,779 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:19:06,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:19:06,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:19:06,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:19:06,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,787 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,793 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:19:06,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,796 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,799 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,800 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:19:06,801 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:19:06,801 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:19:06,804 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:19:06,805 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (1/1) ... [2025-02-07 20:19:06,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:19:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:06,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:19:06,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:19:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:19:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:19:06,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:19:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:19:06,890 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:19:06,892 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:19:06,973 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-02-07 20:19:06,974 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:19:06,979 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:19:06,979 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:19:06,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:19:06 BoogieIcfgContainer [2025-02-07 20:19:06,979 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:19:06,981 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:19:06,981 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:19:06,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:19:06,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:19:06" (1/3) ... [2025-02-07 20:19:06,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be2d203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:19:06, skipping insertion in model container [2025-02-07 20:19:06,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:19:06" (2/3) ... [2025-02-07 20:19:06,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be2d203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:19:06, skipping insertion in model container [2025-02-07 20:19:06,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:19:06" (3/3) ... [2025-02-07 20:19:06,986 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de32.c [2025-02-07 20:19:06,995 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:19:06,996 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de32.c that has 1 procedures, 10 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 20:19:07,034 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:19:07,042 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;@32514b31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:19:07,043 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:19:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-07 20:19:07,049 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:07,049 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-07 20:19:07,049 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:07,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:07,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1210979259, now seen corresponding path program 1 times [2025-02-07 20:19:07,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:07,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053935351] [2025-02-07 20:19:07,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:07,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:07,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-07 20:19:07,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-07 20:19:07,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:07,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:19:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053935351] [2025-02-07 20:19:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053935351] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:19:07,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:19:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 20:19:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562084554] [2025-02-07 20:19:07,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:19:07,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:19:07,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:07,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:19:07,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:19:07,303 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:07,342 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2025-02-07 20:19:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:19:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-02-07 20:19:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:07,349 INFO L225 Difference]: With dead ends: 18 [2025-02-07 20:19:07,349 INFO L226 Difference]: Without dead ends: 9 [2025-02-07 20:19:07,352 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 [2025-02-07 20:19:07,354 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:07,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-07 20:19:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-02-07 20:19:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2025-02-07 20:19:07,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 6 [2025-02-07 20:19:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:07,375 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2025-02-07 20:19:07,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2025-02-07 20:19:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-07 20:19:07,376 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:07,376 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:07,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:19:07,376 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:07,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1115180828, now seen corresponding path program 1 times [2025-02-07 20:19:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188120603] [2025-02-07 20:19:07,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:07,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-07 20:19:07,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-07 20:19:07,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:07,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:19:07,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:07,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188120603] [2025-02-07 20:19:07,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188120603] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:19:07,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:19:07,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 20:19:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566320090] [2025-02-07 20:19:07,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:19:07,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:19:07,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:07,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:19:07,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:19:07,439 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:07,484 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2025-02-07 20:19:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:19:07,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-02-07 20:19:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:07,485 INFO L225 Difference]: With dead ends: 17 [2025-02-07 20:19:07,485 INFO L226 Difference]: Without dead ends: 10 [2025-02-07 20:19:07,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:19:07,487 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:07,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-07 20:19:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-07 20:19:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2025-02-07 20:19:07,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2025-02-07 20:19:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:07,492 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2025-02-07 20:19:07,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2025-02-07 20:19:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:19:07,492 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:07,492 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:07,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 20:19:07,493 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:07,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash 733062490, now seen corresponding path program 1 times [2025-02-07 20:19:07,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:07,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898227953] [2025-02-07 20:19:07,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:07,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:07,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:19:07,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:19:07,508 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:07,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:07,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898227953] [2025-02-07 20:19:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898227953] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016770594] [2025-02-07 20:19:07,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:07,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:19:07,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:19:07,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:19:07,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:19:07,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:07,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:07,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 20:19:07,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:19:07,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016770594] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:07,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:19:07,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2025-02-07 20:19:07,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455899061] [2025-02-07 20:19:07,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:19:07,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:19:07,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:07,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:19:07,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:19:07,720 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:07,745 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2025-02-07 20:19:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:19:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 20:19:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:07,745 INFO L225 Difference]: With dead ends: 14 [2025-02-07 20:19:07,745 INFO L226 Difference]: Without dead ends: 11 [2025-02-07 20:19:07,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:19:07,746 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:07,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-07 20:19:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2025-02-07 20:19:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2025-02-07 20:19:07,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 8 [2025-02-07 20:19:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:07,748 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2025-02-07 20:19:07,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2025-02-07 20:19:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:19:07,749 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:07,749 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:07,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:19:07,949 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 [2025-02-07 20:19:07,950 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:07,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash 733926429, now seen corresponding path program 1 times [2025-02-07 20:19:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:07,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724671213] [2025-02-07 20:19:07,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:07,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:07,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:19:07,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:19:07,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:07,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:08,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724671213] [2025-02-07 20:19:08,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724671213] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:08,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248249562] [2025-02-07 20:19:08,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:08,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:08,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:19:08,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:19:08,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:19:08,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:19:08,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:08,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:08,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 20:19:08,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248249562] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:08,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:19:08,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-02-07 20:19:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889165461] [2025-02-07 20:19:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:19:08,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:19:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:08,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:19:08,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:19:08,152 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:08,180 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2025-02-07 20:19:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:19:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 20:19:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:08,181 INFO L225 Difference]: With dead ends: 15 [2025-02-07 20:19:08,181 INFO L226 Difference]: Without dead ends: 10 [2025-02-07 20:19:08,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:19:08,182 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:08,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-07 20:19:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-07 20:19:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-02-07 20:19:08,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2025-02-07 20:19:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:08,188 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-02-07 20:19:08,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-02-07 20:19:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 20:19:08,189 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:08,189 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:08,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 20:19:08,389 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 [2025-02-07 20:19:08,389 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:08,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1250132456, now seen corresponding path program 1 times [2025-02-07 20:19:08,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:08,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785619833] [2025-02-07 20:19:08,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:08,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:08,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:19:08,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:19:08,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:08,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785619833] [2025-02-07 20:19:08,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785619833] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:08,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623959684] [2025-02-07 20:19:08,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:19:08,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:08,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:19:08,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:19:08,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:19:08,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:19:08,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:08,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:08,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 20:19:08,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623959684] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:08,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:08,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-02-07 20:19:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088788934] [2025-02-07 20:19:08,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:08,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:19:08,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:08,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:19:08,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:19:08,649 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:08,672 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2025-02-07 20:19:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:19:08,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-07 20:19:08,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:08,673 INFO L225 Difference]: With dead ends: 16 [2025-02-07 20:19:08,673 INFO L226 Difference]: Without dead ends: 13 [2025-02-07 20:19:08,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:19:08,674 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 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 [2025-02-07 20:19:08,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-07 20:19:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2025-02-07 20:19:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2025-02-07 20:19:08,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2025-02-07 20:19:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:08,677 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2025-02-07 20:19:08,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2025-02-07 20:19:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 20:19:08,678 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:08,678 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:08,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:19:08,878 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 [2025-02-07 20:19:08,879 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:08,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 72650109, now seen corresponding path program 2 times [2025-02-07 20:19:08,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:08,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491064406] [2025-02-07 20:19:08,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:08,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:08,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-07 20:19:08,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 20:19:08,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:08,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491064406] [2025-02-07 20:19:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491064406] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758672777] [2025-02-07 20:19:08,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:08,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:08,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:19:08,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:19:09,001 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-02-07 20:19:09,010 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 20:19:09,010 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:09,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:09,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:19:09,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:09,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:19:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758672777] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:09,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2025-02-07 20:19:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344079783] [2025-02-07 20:19:09,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:09,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:19:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:09,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:19:09,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:19:09,094 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:09,153 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2025-02-07 20:19:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:19:09,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-02-07 20:19:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:09,154 INFO L225 Difference]: With dead ends: 36 [2025-02-07 20:19:09,154 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 20:19:09,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:19:09,155 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:09,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 23 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 20:19:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 12. [2025-02-07 20:19:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2025-02-07 20:19:09,158 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2025-02-07 20:19:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:09,159 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2025-02-07 20:19:09,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2025-02-07 20:19:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 20:19:09,159 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:09,159 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:09,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 20:19:09,363 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 [2025-02-07 20:19:09,363 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:09,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash -364615964, now seen corresponding path program 3 times [2025-02-07 20:19:09,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:09,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214225715] [2025-02-07 20:19:09,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:09,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:09,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 11 statements into 2 equivalence classes. [2025-02-07 20:19:09,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 20:19:09,377 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 20:19:09,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214225715] [2025-02-07 20:19:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214225715] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603634581] [2025-02-07 20:19:09,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:09,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:09,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:09,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:19:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:19:09,494 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 11 statements into 2 equivalence classes. [2025-02-07 20:19:09,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 20:19:09,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 20:19:09,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:09,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:19:09,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:09,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603634581] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:09,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:09,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-02-07 20:19:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498843185] [2025-02-07 20:19:09,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:09,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:19:09,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:09,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:19:09,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:19:09,572 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:09,645 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2025-02-07 20:19:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 20:19:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-07 20:19:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:09,646 INFO L225 Difference]: With dead ends: 30 [2025-02-07 20:19:09,646 INFO L226 Difference]: Without dead ends: 22 [2025-02-07 20:19:09,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:19:09,646 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:09,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-07 20:19:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-02-07 20:19:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2025-02-07 20:19:09,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2025-02-07 20:19:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:09,652 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2025-02-07 20:19:09,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2025-02-07 20:19:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-07 20:19:09,653 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:09,653 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:09,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 20:19:09,857 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 [2025-02-07 20:19:09,857 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:09,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash 751593371, now seen corresponding path program 4 times [2025-02-07 20:19:09,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:09,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552337237] [2025-02-07 20:19:09,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:09,861 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 12 statements into 2 equivalence classes. [2025-02-07 20:19:09,867 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 20:19:09,867 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:09,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552337237] [2025-02-07 20:19:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552337237] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556789633] [2025-02-07 20:19:09,932 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:09,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:09,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:19:09,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:19:09,955 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 12 statements into 2 equivalence classes. [2025-02-07 20:19:09,962 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 20:19:09,962 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:09,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:09,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 20:19:09,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:09,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556789633] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:10,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:10,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2025-02-07 20:19:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130438288] [2025-02-07 20:19:10,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:10,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:19:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:10,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:19:10,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:19:10,017 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:10,046 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2025-02-07 20:19:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:19:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-02-07 20:19:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:10,047 INFO L225 Difference]: With dead ends: 32 [2025-02-07 20:19:10,047 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 20:19:10,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:19:10,048 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:10,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 20:19:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-02-07 20:19:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2025-02-07 20:19:10,054 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2025-02-07 20:19:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:10,054 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2025-02-07 20:19:10,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2025-02-07 20:19:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 20:19:10,055 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:10,055 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:10,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:19:10,259 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 [2025-02-07 20:19:10,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:10,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash -70308677, now seen corresponding path program 5 times [2025-02-07 20:19:10,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:10,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592199186] [2025-02-07 20:19:10,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:10,267 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 3 equivalence classes. [2025-02-07 20:19:10,283 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 20:19:10,283 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 20:19:10,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 20:19:10,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592199186] [2025-02-07 20:19:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592199186] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940002630] [2025-02-07 20:19:10,394 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:10,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:10,395 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) [2025-02-07 20:19:10,397 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 [2025-02-07 20:19:10,424 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 3 equivalence classes. [2025-02-07 20:19:10,435 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 20:19:10,435 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 20:19:10,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:10,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:19:10,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:19:10,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:19:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940002630] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:10,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:10,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2025-02-07 20:19:10,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590907017] [2025-02-07 20:19:10,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:10,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 20:19:10,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:10,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 20:19:10,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2025-02-07 20:19:10,637 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:10,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:10,940 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2025-02-07 20:19:10,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 20:19:10,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-07 20:19:10,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:10,941 INFO L225 Difference]: With dead ends: 43 [2025-02-07 20:19:10,941 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 20:19:10,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 20:19:10,942 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:10,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 20:19:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2025-02-07 20:19:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2025-02-07 20:19:10,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2025-02-07 20:19:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:10,947 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2025-02-07 20:19:10,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2025-02-07 20:19:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 20:19:10,951 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:10,951 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:10,956 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 [2025-02-07 20:19:11,151 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 [2025-02-07 20:19:11,151 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:11,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1349389944, now seen corresponding path program 6 times [2025-02-07 20:19:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869159550] [2025-02-07 20:19:11,152 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:11,159 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-02-07 20:19:11,174 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 20:19:11,174 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 20:19:11,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:19:11,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869159550] [2025-02-07 20:19:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869159550] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557493691] [2025-02-07 20:19:11,276 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:11,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:11,280 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) [2025-02-07 20:19:11,281 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 [2025-02-07 20:19:11,300 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-02-07 20:19:11,317 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 20:19:11,317 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 20:19:11,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:11,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 20:19:11,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:19:11,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:19:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557493691] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:11,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:11,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-02-07 20:19:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517281869] [2025-02-07 20:19:11,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:11,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 20:19:11,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:11,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 20:19:11,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:19:11,390 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:11,428 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2025-02-07 20:19:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:19:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 20:19:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:11,429 INFO L225 Difference]: With dead ends: 33 [2025-02-07 20:19:11,429 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 20:19:11,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:19:11,429 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:11,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 20:19:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2025-02-07 20:19:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-02-07 20:19:11,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 15 [2025-02-07 20:19:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:11,436 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-02-07 20:19:11,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-02-07 20:19:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-07 20:19:11,436 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:11,436 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:11,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 20:19:11,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:11,637 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:11,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1150813469, now seen corresponding path program 7 times [2025-02-07 20:19:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302781461] [2025-02-07 20:19:11,638 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:11,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:11,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 20:19:11,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 20:19:11,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:11,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:19:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:11,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302781461] [2025-02-07 20:19:11,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302781461] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:11,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077966509] [2025-02-07 20:19:11,740 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:11,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:11,743 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) [2025-02-07 20:19:11,747 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 [2025-02-07 20:19:11,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-07 20:19:11,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-07 20:19:11,777 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:11,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:11,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 20:19:11,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:19:11,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 20:19:11,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077966509] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:11,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:11,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 19 [2025-02-07 20:19:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893665116] [2025-02-07 20:19:11,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:11,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 20:19:11,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:11,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 20:19:11,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:19:11,947 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:12,634 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2025-02-07 20:19:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-07 20:19:12,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-02-07 20:19:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:12,635 INFO L225 Difference]: With dead ends: 78 [2025-02-07 20:19:12,635 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 20:19:12,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2025-02-07 20:19:12,636 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 83 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:12,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 35 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 20:19:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2025-02-07 20:19:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2025-02-07 20:19:12,649 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 16 [2025-02-07 20:19:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:12,649 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2025-02-07 20:19:12,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2025-02-07 20:19:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-07 20:19:12,650 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:12,650 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:12,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 20:19:12,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:12,854 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:12,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:12,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1312470375, now seen corresponding path program 8 times [2025-02-07 20:19:12,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:12,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339385208] [2025-02-07 20:19:12,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:12,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:12,858 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-07 20:19:12,863 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 20:19:12,863 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:12,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339385208] [2025-02-07 20:19:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339385208] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941247702] [2025-02-07 20:19:12,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:12,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:12,944 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) [2025-02-07 20:19:12,946 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 [2025-02-07 20:19:12,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-07 20:19:12,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 20:19:12,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:12,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:12,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 20:19:12,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:19:13,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:13,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941247702] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:13,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:13,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2025-02-07 20:19:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901225322] [2025-02-07 20:19:13,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:13,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 20:19:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:13,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 20:19:13,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:19:13,177 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:13,413 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2025-02-07 20:19:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-07 20:19:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-02-07 20:19:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:13,415 INFO L225 Difference]: With dead ends: 80 [2025-02-07 20:19:13,415 INFO L226 Difference]: Without dead ends: 76 [2025-02-07 20:19:13,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2025-02-07 20:19:13,416 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:13,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-07 20:19:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2025-02-07 20:19:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2025-02-07 20:19:13,432 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 17 [2025-02-07 20:19:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:13,432 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2025-02-07 20:19:13,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2025-02-07 20:19:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:19:13,433 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:13,433 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:13,438 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 [2025-02-07 20:19:13,637 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,SelfDestructingSolverStorable11 [2025-02-07 20:19:13,637 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:13,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2031907707, now seen corresponding path program 9 times [2025-02-07 20:19:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:13,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294568316] [2025-02-07 20:19:13,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:13,641 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-02-07 20:19:13,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:19:13,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 20:19:13,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:13,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:13,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294568316] [2025-02-07 20:19:13,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294568316] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:13,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135531987] [2025-02-07 20:19:13,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:13,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:13,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:13,810 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) [2025-02-07 20:19:13,812 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 [2025-02-07 20:19:13,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-02-07 20:19:13,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:19:13,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 20:19:13,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:13,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 20:19:13,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:13,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:13,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135531987] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:13,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:13,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-07 20:19:13,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739463722] [2025-02-07 20:19:13,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:13,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:19:13,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:13,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:19:13,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:19:13,938 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:13,999 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2025-02-07 20:19:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:19:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-02-07 20:19:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:14,004 INFO L225 Difference]: With dead ends: 67 [2025-02-07 20:19:14,004 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 20:19:14,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:19:14,004 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:14,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:19:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 20:19:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2025-02-07 20:19:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2025-02-07 20:19:14,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 18 [2025-02-07 20:19:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:14,018 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2025-02-07 20:19:14,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2025-02-07 20:19:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:19:14,019 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:14,019 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:14,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 20:19:14,219 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,SelfDestructingSolverStorable12 [2025-02-07 20:19:14,219 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:14,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1468149861, now seen corresponding path program 10 times [2025-02-07 20:19:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290900438] [2025-02-07 20:19:14,220 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:14,223 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-07 20:19:14,227 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:19:14,227 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:14,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:14,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290900438] [2025-02-07 20:19:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290900438] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677774517] [2025-02-07 20:19:14,333 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:14,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:14,336 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) [2025-02-07 20:19:14,339 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 [2025-02-07 20:19:14,357 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-02-07 20:19:14,366 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:19:14,366 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:14,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:14,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 20:19:14,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:14,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 20:19:14,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677774517] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:14,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:14,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2025-02-07 20:19:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929672523] [2025-02-07 20:19:14,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:14,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 20:19:14,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:14,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 20:19:14,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:19:14,499 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:14,827 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2025-02-07 20:19:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-07 20:19:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-02-07 20:19:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:14,828 INFO L225 Difference]: With dead ends: 76 [2025-02-07 20:19:14,828 INFO L226 Difference]: Without dead ends: 65 [2025-02-07 20:19:14,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 20:19:14,829 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:14,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-07 20:19:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2025-02-07 20:19:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2025-02-07 20:19:14,859 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 18 [2025-02-07 20:19:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:14,859 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2025-02-07 20:19:14,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2025-02-07 20:19:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:19:14,860 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:14,860 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:14,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 20:19:15,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:15,061 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:15,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:15,061 INFO L85 PathProgramCache]: Analyzing trace with hash -437230940, now seen corresponding path program 11 times [2025-02-07 20:19:15,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:15,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115136783] [2025-02-07 20:19:15,062 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:15,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:15,064 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 4 equivalence classes. [2025-02-07 20:19:15,071 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:19:15,071 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 20:19:15,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:15,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:15,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115136783] [2025-02-07 20:19:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115136783] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23057865] [2025-02-07 20:19:15,154 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:15,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:15,155 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) [2025-02-07 20:19:15,160 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 [2025-02-07 20:19:15,180 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 4 equivalence classes. [2025-02-07 20:19:15,202 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:19:15,202 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 20:19:15,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:15,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-07 20:19:15,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:15,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:19:15,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23057865] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:15,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:15,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2025-02-07 20:19:15,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216713825] [2025-02-07 20:19:15,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:15,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 20:19:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:15,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 20:19:15,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-02-07 20:19:15,430 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:15,766 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2025-02-07 20:19:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-07 20:19:15,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 20:19:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:15,767 INFO L225 Difference]: With dead ends: 104 [2025-02-07 20:19:15,767 INFO L226 Difference]: Without dead ends: 90 [2025-02-07 20:19:15,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2025-02-07 20:19:15,767 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:15,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 51 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-02-07 20:19:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2025-02-07 20:19:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2025-02-07 20:19:15,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2025-02-07 20:19:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:15,782 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2025-02-07 20:19:15,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2025-02-07 20:19:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 20:19:15,783 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:15,783 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:15,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 20:19:15,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:15,984 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:15,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash -184948440, now seen corresponding path program 12 times [2025-02-07 20:19:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:15,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073339236] [2025-02-07 20:19:15,984 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:15,987 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 4 equivalence classes. [2025-02-07 20:19:15,997 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:19:15,997 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 20:19:15,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:16,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073339236] [2025-02-07 20:19:16,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073339236] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:16,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360115736] [2025-02-07 20:19:16,134 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:16,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:16,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:16,136 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) [2025-02-07 20:19:16,137 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 [2025-02-07 20:19:16,157 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 4 equivalence classes. [2025-02-07 20:19:16,169 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:19:16,169 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 20:19:16,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:16,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 20:19:16,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:16,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360115736] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:16,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2025-02-07 20:19:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467276585] [2025-02-07 20:19:16,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:16,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 20:19:16,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:16,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 20:19:16,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:19:16,287 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:16,372 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2025-02-07 20:19:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 20:19:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-02-07 20:19:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:16,373 INFO L225 Difference]: With dead ends: 76 [2025-02-07 20:19:16,373 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 20:19:16,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 15 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:19:16,374 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:16,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 20:19:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2025-02-07 20:19:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2025-02-07 20:19:16,409 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 21 [2025-02-07 20:19:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:16,409 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2025-02-07 20:19:16,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2025-02-07 20:19:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 20:19:16,409 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:16,409 INFO L218 NwaCegarLoop]: trace histogram [7, 5, 3, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:16,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 20:19:16,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 20:19:16,610 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:16,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash -780878520, now seen corresponding path program 13 times [2025-02-07 20:19:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750035379] [2025-02-07 20:19:16,610 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:16,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:16,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-07 20:19:16,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:19:16,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:16,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:16,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750035379] [2025-02-07 20:19:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750035379] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675860764] [2025-02-07 20:19:16,736 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:16,738 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) [2025-02-07 20:19:16,739 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 [2025-02-07 20:19:16,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-07 20:19:16,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:19:16,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:16,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:16,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-07 20:19:16,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:16,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-07 20:19:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675860764] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:16,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:16,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 26 [2025-02-07 20:19:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262840405] [2025-02-07 20:19:16,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:16,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 20:19:16,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:16,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 20:19:16,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2025-02-07 20:19:16,965 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:17,389 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2025-02-07 20:19:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-07 20:19:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2025-02-07 20:19:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:17,393 INFO L225 Difference]: With dead ends: 78 [2025-02-07 20:19:17,393 INFO L226 Difference]: Without dead ends: 64 [2025-02-07 20:19:17,394 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 20:19:17,394 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:17,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 63 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:19:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-07 20:19:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2025-02-07 20:19:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2025-02-07 20:19:17,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 21 [2025-02-07 20:19:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:17,415 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2025-02-07 20:19:17,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2025-02-07 20:19:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-07 20:19:17,416 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:17,416 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:17,422 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 [2025-02-07 20:19:17,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 20:19:17,620 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:17,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash -561830723, now seen corresponding path program 14 times [2025-02-07 20:19:17,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:17,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38816487] [2025-02-07 20:19:17,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:17,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:17,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-07 20:19:17,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 20:19:17,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:17,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38816487] [2025-02-07 20:19:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38816487] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31200115] [2025-02-07 20:19:17,783 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:17,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:17,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:17,785 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) [2025-02-07 20:19:17,786 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 [2025-02-07 20:19:17,806 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-07 20:19:17,816 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 20:19:17,817 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:17,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:17,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-07 20:19:17,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:17,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:18,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31200115] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:18,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:18,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2025-02-07 20:19:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747199495] [2025-02-07 20:19:18,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:18,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-07 20:19:18,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:18,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-07 20:19:18,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2025-02-07 20:19:18,050 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:20,262 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2025-02-07 20:19:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2025-02-07 20:19:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-02-07 20:19:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:20,263 INFO L225 Difference]: With dead ends: 133 [2025-02-07 20:19:20,263 INFO L226 Difference]: Without dead ends: 110 [2025-02-07 20:19:20,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1188, Invalid=6644, Unknown=0, NotChecked=0, Total=7832 [2025-02-07 20:19:20,265 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 205 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:20,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 69 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:19:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-02-07 20:19:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2025-02-07 20:19:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2025-02-07 20:19:20,294 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 22 [2025-02-07 20:19:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:20,294 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2025-02-07 20:19:20,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2025-02-07 20:19:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 20:19:20,295 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:20,295 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:20,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 20:19:20,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 20:19:20,496 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:20,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 66074459, now seen corresponding path program 15 times [2025-02-07 20:19:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:20,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136926344] [2025-02-07 20:19:20,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:20,501 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-07 20:19:20,518 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 20:19:20,518 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:19:20,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:19:20,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:20,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136926344] [2025-02-07 20:19:20,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136926344] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:20,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513544756] [2025-02-07 20:19:20,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:20,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:20,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:20,664 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) [2025-02-07 20:19:20,665 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 [2025-02-07 20:19:20,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 4 equivalence classes. [2025-02-07 20:19:20,717 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 20:19:20,717 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:19:20,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:20,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 20:19:20,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:19:20,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:19:20,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513544756] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:20,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:20,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2025-02-07 20:19:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823682717] [2025-02-07 20:19:20,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:20,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:19:20,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:20,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:19:20,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:19:20,887 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:20,988 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2025-02-07 20:19:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 20:19:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-02-07 20:19:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:20,989 INFO L225 Difference]: With dead ends: 96 [2025-02-07 20:19:20,989 INFO L226 Difference]: Without dead ends: 86 [2025-02-07 20:19:20,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 16 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:19:20,990 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:20,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-02-07 20:19:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2025-02-07 20:19:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2025-02-07 20:19:21,030 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 24 [2025-02-07 20:19:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:21,031 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2025-02-07 20:19:21,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2025-02-07 20:19:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 20:19:21,031 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:21,031 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:21,038 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 [2025-02-07 20:19:21,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:21,235 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:21,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash -842702972, now seen corresponding path program 16 times [2025-02-07 20:19:21,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:21,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471153988] [2025-02-07 20:19:21,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:21,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:21,242 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-07 20:19:21,247 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:19:21,247 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:21,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:19:21,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:21,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471153988] [2025-02-07 20:19:21,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471153988] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:21,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195768604] [2025-02-07 20:19:21,378 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:21,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:21,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:21,380 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) [2025-02-07 20:19:21,384 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 [2025-02-07 20:19:21,406 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-02-07 20:19:21,417 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:19:21,418 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:21,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:21,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 20:19:21,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:19:21,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:19:21,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195768604] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:21,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:21,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 31 [2025-02-07 20:19:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732438997] [2025-02-07 20:19:21,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:21,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 20:19:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:21,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 20:19:21,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2025-02-07 20:19:21,733 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:25,785 INFO L93 Difference]: Finished difference Result 187 states and 229 transitions. [2025-02-07 20:19:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-02-07 20:19:25,785 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-02-07 20:19:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:25,786 INFO L225 Difference]: With dead ends: 187 [2025-02-07 20:19:25,786 INFO L226 Difference]: Without dead ends: 156 [2025-02-07 20:19:25,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1949, Invalid=10933, Unknown=0, NotChecked=0, Total=12882 [2025-02-07 20:19:25,789 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 350 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:25,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 47 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:19:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-02-07 20:19:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 82. [2025-02-07 20:19:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 81 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2025-02-07 20:19:25,835 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 25 [2025-02-07 20:19:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:25,835 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2025-02-07 20:19:25,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2025-02-07 20:19:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 20:19:25,836 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:25,836 INFO L218 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:25,842 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 [2025-02-07 20:19:26,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:26,040 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:26,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -164251875, now seen corresponding path program 17 times [2025-02-07 20:19:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:26,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824110525] [2025-02-07 20:19:26,040 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:26,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:26,044 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 7 equivalence classes. [2025-02-07 20:19:26,055 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:19:26,055 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 20:19:26,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:26,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824110525] [2025-02-07 20:19:26,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824110525] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:26,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742607932] [2025-02-07 20:19:26,226 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:26,228 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) [2025-02-07 20:19:26,229 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 [2025-02-07 20:19:26,254 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 7 equivalence classes. [2025-02-07 20:19:26,302 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:19:26,302 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 20:19:26,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:26,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-07 20:19:26,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:26,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:19:26,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742607932] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:26,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:26,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 34 [2025-02-07 20:19:26,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373325328] [2025-02-07 20:19:26,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:26,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 20:19:26,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:26,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 20:19:26,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 20:19:26,627 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:27,944 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2025-02-07 20:19:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-02-07 20:19:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 20:19:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:27,946 INFO L225 Difference]: With dead ends: 151 [2025-02-07 20:19:27,946 INFO L226 Difference]: Without dead ends: 137 [2025-02-07 20:19:27,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=525, Invalid=4167, Unknown=0, NotChecked=0, Total=4692 [2025-02-07 20:19:27,948 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:27,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 108 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 20:19:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-07 20:19:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2025-02-07 20:19:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 113 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2025-02-07 20:19:28,010 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 26 [2025-02-07 20:19:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:28,010 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2025-02-07 20:19:28,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2025-02-07 20:19:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-07 20:19:28,011 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:28,011 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:28,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 20:19:28,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:28,215 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:28,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash 386492616, now seen corresponding path program 18 times [2025-02-07 20:19:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:28,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459942091] [2025-02-07 20:19:28,215 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:28,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:28,218 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-02-07 20:19:28,231 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 20:19:28,235 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 20:19:28,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:19:28,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459942091] [2025-02-07 20:19:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459942091] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726810851] [2025-02-07 20:19:28,384 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:28,386 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) [2025-02-07 20:19:28,394 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 [2025-02-07 20:19:28,418 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 5 equivalence classes. [2025-02-07 20:19:28,453 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 27 of 27 statements. [2025-02-07 20:19:28,453 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 20:19:28,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:28,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-07 20:19:28,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:19:28,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:19:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726810851] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:28,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:28,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2025-02-07 20:19:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990578137] [2025-02-07 20:19:28,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:28,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:19:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:28,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:19:28,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:19:28,607 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:28,779 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2025-02-07 20:19:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:19:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-07 20:19:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:28,781 INFO L225 Difference]: With dead ends: 140 [2025-02-07 20:19:28,781 INFO L226 Difference]: Without dead ends: 129 [2025-02-07 20:19:28,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:19:28,782 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:28,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 53 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-02-07 20:19:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2025-02-07 20:19:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 121 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2025-02-07 20:19:28,854 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 27 [2025-02-07 20:19:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:28,854 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2025-02-07 20:19:28,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2025-02-07 20:19:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 20:19:28,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:28,855 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:28,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 20:19:29,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:29,059 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:29,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -331617187, now seen corresponding path program 19 times [2025-02-07 20:19:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953049707] [2025-02-07 20:19:29,060 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:29,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:29,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:19:29,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:19:29,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:29,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:19:29,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953049707] [2025-02-07 20:19:29,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953049707] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392159074] [2025-02-07 20:19:29,219 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:29,224 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) [2025-02-07 20:19:29,225 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 [2025-02-07 20:19:29,249 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:19:29,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:19:29,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:29,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:29,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-07 20:19:29,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:19:29,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:19:29,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392159074] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:29,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:29,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 35 [2025-02-07 20:19:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954134944] [2025-02-07 20:19:29,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:29,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-07 20:19:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:29,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-07 20:19:29,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 20:19:29,686 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:36,595 INFO L93 Difference]: Finished difference Result 264 states and 315 transitions. [2025-02-07 20:19:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2025-02-07 20:19:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-02-07 20:19:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:36,596 INFO L225 Difference]: With dead ends: 264 [2025-02-07 20:19:36,596 INFO L226 Difference]: Without dead ends: 223 [2025-02-07 20:19:36,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6257 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3033, Invalid=16989, Unknown=0, NotChecked=0, Total=20022 [2025-02-07 20:19:36,600 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 431 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:36,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 72 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 20:19:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-02-07 20:19:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 131. [2025-02-07 20:19:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2) internal successors, (156), 130 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2025-02-07 20:19:36,678 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 28 [2025-02-07 20:19:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:36,678 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2025-02-07 20:19:36,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2025-02-07 20:19:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 20:19:36,678 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:36,679 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:36,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 20:19:36,879 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,SelfDestructingSolverStorable22 [2025-02-07 20:19:36,879 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:36,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:36,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1919306949, now seen corresponding path program 20 times [2025-02-07 20:19:36,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:36,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56316747] [2025-02-07 20:19:36,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:36,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:36,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 20:19:36,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:19:36,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:36,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:19:37,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56316747] [2025-02-07 20:19:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56316747] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:37,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712457138] [2025-02-07 20:19:37,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:19:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:37,076 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) [2025-02-07 20:19:37,077 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 [2025-02-07 20:19:37,100 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 20:19:37,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:19:37,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:19:37,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:37,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-07 20:19:37,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:19:37,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:19:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712457138] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:37,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:37,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2025-02-07 20:19:37,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853811769] [2025-02-07 20:19:37,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:37,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 20:19:37,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:37,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 20:19:37,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:19:37,376 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:37,565 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2025-02-07 20:19:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:19:37,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-07 20:19:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:37,567 INFO L225 Difference]: With dead ends: 159 [2025-02-07 20:19:37,567 INFO L226 Difference]: Without dead ends: 147 [2025-02-07 20:19:37,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 19 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:19:37,570 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:37,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-02-07 20:19:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2025-02-07 20:19:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 138 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2025-02-07 20:19:37,652 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 30 [2025-02-07 20:19:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:37,652 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2025-02-07 20:19:37,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2025-02-07 20:19:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 20:19:37,653 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:37,653 INFO L218 NwaCegarLoop]: trace histogram [13, 6, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:37,659 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 [2025-02-07 20:19:37,857 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,SelfDestructingSolverStorable23 [2025-02-07 20:19:37,857 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:37,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash 850672858, now seen corresponding path program 21 times [2025-02-07 20:19:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:37,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621756112] [2025-02-07 20:19:37,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:37,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 8 equivalence classes. [2025-02-07 20:19:37,868 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 23 of 30 statements. [2025-02-07 20:19:37,868 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:19:37,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-07 20:19:38,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:38,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621756112] [2025-02-07 20:19:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621756112] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:38,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326268003] [2025-02-07 20:19:38,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:19:38,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:38,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:38,003 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) [2025-02-07 20:19:38,004 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 [2025-02-07 20:19:38,027 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 8 equivalence classes. [2025-02-07 20:19:38,043 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 23 of 30 statements. [2025-02-07 20:19:38,043 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 20:19:38,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:38,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 20:19:38,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-07 20:19:38,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-07 20:19:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326268003] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:38,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:38,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2025-02-07 20:19:38,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220667348] [2025-02-07 20:19:38,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:38,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 20:19:38,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:38,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 20:19:38,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:19:38,241 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:38,483 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2025-02-07 20:19:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 20:19:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-07 20:19:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:38,485 INFO L225 Difference]: With dead ends: 148 [2025-02-07 20:19:38,485 INFO L226 Difference]: Without dead ends: 138 [2025-02-07 20:19:38,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:19:38,486 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:38,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-07 20:19:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2025-02-07 20:19:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.183206106870229) internal successors, (155), 131 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2025-02-07 20:19:38,575 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 30 [2025-02-07 20:19:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:38,575 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2025-02-07 20:19:38,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2025-02-07 20:19:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 20:19:38,575 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:38,575 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:38,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-07 20:19:38,780 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,SelfDestructingSolverStorable24 [2025-02-07 20:19:38,780 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:38,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1182626916, now seen corresponding path program 22 times [2025-02-07 20:19:38,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:38,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064323958] [2025-02-07 20:19:38,781 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:38,783 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-02-07 20:19:38,791 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:19:38,792 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:38,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:19:38,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064323958] [2025-02-07 20:19:38,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064323958] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:38,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353171201] [2025-02-07 20:19:38,986 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:19:38,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:38,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:38,988 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) [2025-02-07 20:19:38,989 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 [2025-02-07 20:19:39,015 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-02-07 20:19:39,030 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:19:39,030 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:19:39,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:39,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-07 20:19:39,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:19:39,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:19:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353171201] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:39,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:39,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 39 [2025-02-07 20:19:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923369459] [2025-02-07 20:19:39,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:39,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-07 20:19:39,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:39,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-07 20:19:39,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 20:19:39,509 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:50,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:50,501 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2025-02-07 20:19:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2025-02-07 20:19:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-07 20:19:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:50,503 INFO L225 Difference]: With dead ends: 309 [2025-02-07 20:19:50,503 INFO L226 Difference]: Without dead ends: 261 [2025-02-07 20:19:50,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9907 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2025-02-07 20:19:50,505 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 583 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:50,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 64 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 20:19:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-02-07 20:19:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 135. [2025-02-07 20:19:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 134 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2025-02-07 20:19:50,587 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 31 [2025-02-07 20:19:50,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:50,588 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2025-02-07 20:19:50,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2025-02-07 20:19:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 20:19:50,588 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:50,588 INFO L218 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:50,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-07 20:19:50,788 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,SelfDestructingSolverStorable25 [2025-02-07 20:19:50,789 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:50,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2053145341, now seen corresponding path program 23 times [2025-02-07 20:19:50,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:50,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896699132] [2025-02-07 20:19:50,789 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:50,792 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 9 equivalence classes. [2025-02-07 20:19:50,811 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 20:19:50,811 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-07 20:19:50,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 20:19:51,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896699132] [2025-02-07 20:19:51,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896699132] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424338651] [2025-02-07 20:19:51,076 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:19:51,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:51,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:51,078 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) [2025-02-07 20:19:51,080 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 [2025-02-07 20:19:51,103 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 9 equivalence classes. [2025-02-07 20:19:51,194 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 20:19:51,194 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-07 20:19:51,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:51,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-02-07 20:19:51,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:19:51,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-07 20:19:51,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424338651] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:51,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:51,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 14] total 43 [2025-02-07 20:19:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379653929] [2025-02-07 20:19:51,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:51,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-07 20:19:51,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:51,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-07 20:19:51,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1441, Unknown=0, NotChecked=0, Total=1806 [2025-02-07 20:19:51,649 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:53,022 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2025-02-07 20:19:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-02-07 20:19:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-02-07 20:19:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:53,024 INFO L225 Difference]: With dead ends: 312 [2025-02-07 20:19:53,024 INFO L226 Difference]: Without dead ends: 301 [2025-02-07 20:19:53,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1528, Invalid=4792, Unknown=0, NotChecked=0, Total=6320 [2025-02-07 20:19:53,025 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 183 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:53,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 163 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 20:19:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2025-02-07 20:19:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 166. [2025-02-07 20:19:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1757575757575758) internal successors, (194), 165 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2025-02-07 20:19:53,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 32 [2025-02-07 20:19:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:53,142 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2025-02-07 20:19:53,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2025-02-07 20:19:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 20:19:53,142 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:53,142 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:53,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-07 20:19:53,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 20:19:53,343 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:53,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash 680423528, now seen corresponding path program 24 times [2025-02-07 20:19:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:53,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702717176] [2025-02-07 20:19:53,343 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:53,346 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 6 equivalence classes. [2025-02-07 20:19:53,366 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 20:19:53,366 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 20:19:53,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:19:53,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702717176] [2025-02-07 20:19:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702717176] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525664700] [2025-02-07 20:19:53,544 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:19:53,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:53,548 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) [2025-02-07 20:19:53,552 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 [2025-02-07 20:19:53,576 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 6 equivalence classes. [2025-02-07 20:19:53,659 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 20:19:53,659 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-07 20:19:53,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:53,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-07 20:19:53,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:19:53,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:19:53,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525664700] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:53,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:53,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-02-07 20:19:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962125036] [2025-02-07 20:19:53,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:53,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 20:19:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:53,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 20:19:53,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:19:53,854 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:19:54,115 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2025-02-07 20:19:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 20:19:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-02-07 20:19:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:19:54,116 INFO L225 Difference]: With dead ends: 197 [2025-02-07 20:19:54,116 INFO L226 Difference]: Without dead ends: 184 [2025-02-07 20:19:54,117 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 21 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:19:54,118 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:19:54,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:19:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2025-02-07 20:19:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2025-02-07 20:19:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1781609195402298) internal successors, (205), 174 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 205 transitions. [2025-02-07 20:19:54,236 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 205 transitions. Word has length 33 [2025-02-07 20:19:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:19:54,236 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 205 transitions. [2025-02-07 20:19:54,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:19:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 205 transitions. [2025-02-07 20:19:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 20:19:54,236 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:19:54,236 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2025-02-07 20:19:54,246 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 [2025-02-07 20:19:54,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 20:19:54,437 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:19:54,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:19:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash -462922755, now seen corresponding path program 25 times [2025-02-07 20:19:54,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:19:54,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032030916] [2025-02-07 20:19:54,438 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:19:54,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:19:54,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:19:54,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:54,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:19:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:19:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032030916] [2025-02-07 20:19:54,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032030916] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:19:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434678114] [2025-02-07 20:19:54,659 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:19:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:19:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:19:54,661 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) [2025-02-07 20:19:54,662 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 [2025-02-07 20:19:54,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:19:54,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:19:54,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:19:54,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:19:54,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-07 20:19:54,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:19:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:19:54,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:19:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-07 20:19:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434678114] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:19:55,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:19:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2025-02-07 20:19:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319902977] [2025-02-07 20:19:55,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:19:55,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-07 20:19:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:19:55,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-07 20:19:55,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 20:19:55,260 INFO L87 Difference]: Start difference. First operand 175 states and 205 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:20:12,544 INFO L93 Difference]: Finished difference Result 412 states and 488 transitions. [2025-02-07 20:20:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2025-02-07 20:20:12,545 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-02-07 20:20:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:20:12,546 INFO L225 Difference]: With dead ends: 412 [2025-02-07 20:20:12,546 INFO L226 Difference]: Without dead ends: 354 [2025-02-07 20:20:12,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14961 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2025-02-07 20:20:12,549 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 847 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 20:20:12,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 65 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 20:20:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2025-02-07 20:20:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 190. [2025-02-07 20:20:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 225 transitions. [2025-02-07 20:20:12,685 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 225 transitions. Word has length 34 [2025-02-07 20:20:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:20:12,685 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 225 transitions. [2025-02-07 20:20:12,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 225 transitions. [2025-02-07 20:20:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 20:20:12,686 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:20:12,686 INFO L218 NwaCegarLoop]: trace histogram [16, 7, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 20:20:12,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-07 20:20:12,891 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,SelfDestructingSolverStorable28 [2025-02-07 20:20:12,891 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:20:12,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:20:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1611519545, now seen corresponding path program 26 times [2025-02-07 20:20:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:20:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672338761] [2025-02-07 20:20:12,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:20:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:20:12,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-02-07 20:20:12,902 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 20:20:12,902 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:20:12,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:20:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:20:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672338761] [2025-02-07 20:20:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672338761] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:20:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958801770] [2025-02-07 20:20:13,118 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:20:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:20:13,121 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) [2025-02-07 20:20:13,121 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 [2025-02-07 20:20:13,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-02-07 20:20:13,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 20:20:13,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:20:13,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:13,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-02-07 20:20:13,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:20:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:20:13,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:20:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-07 20:20:13,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958801770] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:20:13,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:20:13,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 16] total 41 [2025-02-07 20:20:13,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25308962] [2025-02-07 20:20:13,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:20:13,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-07 20:20:13,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:20:13,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-07 20:20:13,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 20:20:13,689 INFO L87 Difference]: Start difference. First operand 190 states and 225 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:20:17,247 INFO L93 Difference]: Finished difference Result 236 states and 287 transitions. [2025-02-07 20:20:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2025-02-07 20:20:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-02-07 20:20:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:20:17,249 INFO L225 Difference]: With dead ends: 236 [2025-02-07 20:20:17,249 INFO L226 Difference]: Without dead ends: 218 [2025-02-07 20:20:17,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1074, Invalid=8238, Unknown=0, NotChecked=0, Total=9312 [2025-02-07 20:20:17,253 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 20:20:17,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 208 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 20:20:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-02-07 20:20:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2025-02-07 20:20:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.163265306122449) internal successors, (228), 196 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 228 transitions. [2025-02-07 20:20:17,405 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 228 transitions. Word has length 35 [2025-02-07 20:20:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:20:17,405 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 228 transitions. [2025-02-07 20:20:17,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 228 transitions. [2025-02-07 20:20:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 20:20:17,406 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:20:17,407 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2025-02-07 20:20:17,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-07 20:20:17,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:17,607 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:20:17,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:20:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -538253541, now seen corresponding path program 27 times [2025-02-07 20:20:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:20:17,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121285052] [2025-02-07 20:20:17,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:20:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:20:17,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 6 equivalence classes. [2025-02-07 20:20:17,625 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 20:20:17,625 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:20:17,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 20:20:17,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:20:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121285052] [2025-02-07 20:20:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121285052] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:20:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301878311] [2025-02-07 20:20:17,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:20:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:20:17,854 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) [2025-02-07 20:20:17,857 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 [2025-02-07 20:20:17,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 6 equivalence classes. [2025-02-07 20:20:17,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 20:20:17,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:20:17,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:17,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:20:17,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:20:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 20:20:18,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:20:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 20:20:18,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301878311] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:20:18,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:20:18,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2025-02-07 20:20:18,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561252901] [2025-02-07 20:20:18,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:20:18,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 20:20:18,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:20:18,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 20:20:18,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:20:18,183 INFO L87 Difference]: Start difference. First operand 197 states and 228 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:20:18,498 INFO L93 Difference]: Finished difference Result 225 states and 262 transitions. [2025-02-07 20:20:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 20:20:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-02-07 20:20:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:20:18,499 INFO L225 Difference]: With dead ends: 225 [2025-02-07 20:20:18,499 INFO L226 Difference]: Without dead ends: 211 [2025-02-07 20:20:18,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 24 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:20:18,499 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:20:18,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:20:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-02-07 20:20:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2025-02-07 20:20:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.1658536585365853) internal successors, (239), 205 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 239 transitions. [2025-02-07 20:20:18,646 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 239 transitions. Word has length 36 [2025-02-07 20:20:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:20:18,646 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 239 transitions. [2025-02-07 20:20:18,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 239 transitions. [2025-02-07 20:20:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 20:20:18,646 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:20:18,646 INFO L218 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 20:20:18,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-07 20:20:18,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:18,851 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:20:18,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:20:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 719823034, now seen corresponding path program 28 times [2025-02-07 20:20:18,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:20:18,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577392246] [2025-02-07 20:20:18,852 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:20:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:20:18,854 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-07 20:20:18,863 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 20:20:18,864 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:20:18,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:20:19,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:20:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577392246] [2025-02-07 20:20:19,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577392246] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:20:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983367291] [2025-02-07 20:20:19,159 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:20:19,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:19,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:20:19,161 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) [2025-02-07 20:20:19,162 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 [2025-02-07 20:20:19,187 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-07 20:20:19,203 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 20:20:19,203 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:20:19,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:19,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-02-07 20:20:19,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:20:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:20:19,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:20:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-02-07 20:20:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983367291] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:20:19,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:20:19,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 16] total 49 [2025-02-07 20:20:19,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980755749] [2025-02-07 20:20:19,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:20:19,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 20:20:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:20:19,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 20:20:19,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 20:20:19,661 INFO L87 Difference]: Start difference. First operand 206 states and 239 transitions. Second operand has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:20:21,521 INFO L93 Difference]: Finished difference Result 408 states and 486 transitions. [2025-02-07 20:20:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-02-07 20:20:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-02-07 20:20:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:20:21,526 INFO L225 Difference]: With dead ends: 408 [2025-02-07 20:20:21,527 INFO L226 Difference]: Without dead ends: 396 [2025-02-07 20:20:21,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2025-02-07 20:20:21,529 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 257 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 20:20:21,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 193 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 20:20:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2025-02-07 20:20:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 208. [2025-02-07 20:20:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1594202898550725) internal successors, (240), 207 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 240 transitions. [2025-02-07 20:20:21,725 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 240 transitions. Word has length 36 [2025-02-07 20:20:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:20:21,726 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 240 transitions. [2025-02-07 20:20:21,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 240 transitions. [2025-02-07 20:20:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 20:20:21,727 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:20:21,727 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2025-02-07 20:20:21,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-02-07 20:20:21,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-02-07 20:20:21,931 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:20:21,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:20:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2024627900, now seen corresponding path program 29 times [2025-02-07 20:20:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:20:21,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865808895] [2025-02-07 20:20:21,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:20:21,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:20:21,936 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 7 equivalence classes. [2025-02-07 20:20:21,954 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:20:21,954 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 20:20:21,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 20:20:22,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:20:22,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865808895] [2025-02-07 20:20:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865808895] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:20:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504225696] [2025-02-07 20:20:22,218 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:20:22,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:22,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:20:22,222 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:20:22,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-02-07 20:20:22,257 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 7 equivalence classes. [2025-02-07 20:20:22,334 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:20:22,334 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-07 20:20:22,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:22,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-02-07 20:20:22,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:20:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 20:20:22,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:20:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 20:20:23,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504225696] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:20:23,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:20:23,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 57 [2025-02-07 20:20:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109562003] [2025-02-07 20:20:23,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:20:23,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-07 20:20:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:20:23,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-07 20:20:23,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2025-02-07 20:20:23,136 INFO L87 Difference]: Start difference. First operand 208 states and 240 transitions. Second operand has 57 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:20:27,096 INFO L93 Difference]: Finished difference Result 450 states and 520 transitions. [2025-02-07 20:20:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2025-02-07 20:20:27,096 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-02-07 20:20:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:20:27,097 INFO L225 Difference]: With dead ends: 450 [2025-02-07 20:20:27,097 INFO L226 Difference]: Without dead ends: 424 [2025-02-07 20:20:27,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2476, Invalid=9956, Unknown=0, NotChecked=0, Total=12432 [2025-02-07 20:20:27,098 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 177 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:20:27,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 118 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 20:20:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2025-02-07 20:20:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 240. [2025-02-07 20:20:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1673640167364017) internal successors, (279), 239 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 279 transitions. [2025-02-07 20:20:27,302 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 279 transitions. Word has length 37 [2025-02-07 20:20:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:20:27,302 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 279 transitions. [2025-02-07 20:20:27,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 279 transitions. [2025-02-07 20:20:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:20:27,303 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:20:27,303 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1] [2025-02-07 20:20:27,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-02-07 20:20:27,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-02-07 20:20:27,504 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:20:27,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:20:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash 852951048, now seen corresponding path program 30 times [2025-02-07 20:20:27,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:20:27,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067491449] [2025-02-07 20:20:27,504 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:20:27,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:20:27,508 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 7 equivalence classes. [2025-02-07 20:20:27,529 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:20:27,530 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 20:20:27,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:20:27,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:20:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067491449] [2025-02-07 20:20:27,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067491449] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:20:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586186526] [2025-02-07 20:20:27,738 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:20:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:20:27,742 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:20:27,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-02-07 20:20:27,768 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 7 equivalence classes. [2025-02-07 20:20:28,017 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:20:28,017 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 20:20:28,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:28,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-02-07 20:20:28,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:20:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:20:28,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:20:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:20:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586186526] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:20:28,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:20:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2025-02-07 20:20:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944869726] [2025-02-07 20:20:28,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:20:28,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 20:20:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:20:28,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 20:20:28,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2025-02-07 20:20:28,288 INFO L87 Difference]: Start difference. First operand 240 states and 279 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:20:28,918 INFO L93 Difference]: Finished difference Result 432 states and 499 transitions. [2025-02-07 20:20:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 20:20:28,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-02-07 20:20:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:20:28,920 INFO L225 Difference]: With dead ends: 432 [2025-02-07 20:20:28,920 INFO L226 Difference]: Without dead ends: 417 [2025-02-07 20:20:28,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 27 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2025-02-07 20:20:28,921 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:20:28,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:20:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2025-02-07 20:20:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 273. [2025-02-07 20:20:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1838235294117647) internal successors, (322), 272 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 322 transitions. [2025-02-07 20:20:29,179 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 322 transitions. Word has length 39 [2025-02-07 20:20:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:20:29,179 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 322 transitions. [2025-02-07 20:20:29,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:20:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 322 transitions. [2025-02-07 20:20:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 20:20:29,180 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:20:29,180 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2025-02-07 20:20:29,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-02-07 20:20:29,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-02-07 20:20:29,381 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:20:29,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:20:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash -97619043, now seen corresponding path program 31 times [2025-02-07 20:20:29,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:20:29,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206677619] [2025-02-07 20:20:29,382 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:20:29,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:20:29,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:20:29,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:20:29,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:20:29,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:20:29,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:20:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206677619] [2025-02-07 20:20:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206677619] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:20:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227836505] [2025-02-07 20:20:29,719 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:20:29,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:20:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:20:29,722 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:20:29,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-02-07 20:20:29,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:20:29,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:20:29,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:20:29,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:20:29,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-07 20:20:29,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:20:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:20:29,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:20:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-07 20:20:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227836505] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:20:30,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:20:30,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 51 [2025-02-07 20:20:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746705498] [2025-02-07 20:20:30,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:20:30,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-07 20:20:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:20:30,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-07 20:20:30,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 20:20:30,564 INFO L87 Difference]: Start difference. First operand 273 states and 322 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)