./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 c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-c00e63d-m [2025-02-05 14:52:54,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 14:52:54,525 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 14:52:54,532 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 14:52:54,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 14:52:54,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 14:52:54,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 14:52:54,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 14:52:54,553 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 14:52:54,554 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 14:52:54,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 14:52:54,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 14:52:54,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 14:52:54,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 14:52:54,555 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 14:52:54,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 14:52:54,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 14:52:54,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 14:52:54,557 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 14:52:54,557 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 14:52:54,557 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 14:52:54,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 14:52:54,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 14:52:54,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 14:52:54,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:52:54,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 14:52:54,558 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 14:52:54,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 14:52:54,559 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 [2025-02-05 14:52:54,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 14:52:54,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 14:52:54,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 14:52:54,800 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 14:52:54,800 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 14:52:54,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2025-02-05 14:52:55,979 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76632b551/02f1b4d3e2b243a9aed04ade6fdd8f62/FLAGf4ba7056a [2025-02-05 14:52:56,178 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 14:52:56,180 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c [2025-02-05 14:52:56,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76632b551/02f1b4d3e2b243a9aed04ade6fdd8f62/FLAGf4ba7056a [2025-02-05 14:52:56,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/76632b551/02f1b4d3e2b243a9aed04ade6fdd8f62 [2025-02-05 14:52:56,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 14:52:56,544 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 14:52:56,546 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 14:52:56,546 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 14:52:56,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 14:52:56,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c540d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56, skipping insertion in model container [2025-02-05 14:52:56,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,561 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 14:52:56,648 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] [2025-02-05 14:52:56,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:52:56,659 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 14:52:56,665 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] [2025-02-05 14:52:56,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 14:52:56,674 INFO L204 MainTranslator]: Completed translation [2025-02-05 14:52:56,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56 WrapperNode [2025-02-05 14:52:56,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 14:52:56,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 14:52:56,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 14:52:56,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 14:52:56,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,695 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2025-02-05 14:52:56,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 14:52:56,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 14:52:56,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 14:52:56,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 14:52:56,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,701 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,711 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 14:52:56,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,713 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 14:52:56,719 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 14:52:56,719 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 14:52:56,719 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 14:52:56,719 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (1/1) ... [2025-02-05 14:52:56,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 14:52:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:56,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 14:52:56,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 14:52:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 14:52:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 14:52:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 14:52:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 14:52:56,804 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 14:52:56,805 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 14:52:56,877 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-02-05 14:52:56,877 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 14:52:56,885 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 14:52:56,885 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 14:52:56,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:52:56 BoogieIcfgContainer [2025-02-05 14:52:56,885 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 14:52:56,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 14:52:56,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 14:52:56,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 14:52:56,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 02:52:56" (1/3) ... [2025-02-05 14:52:56,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71992a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:52:56, skipping insertion in model container [2025-02-05 14:52:56,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 02:52:56" (2/3) ... [2025-02-05 14:52:56,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71992a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 02:52:56, skipping insertion in model container [2025-02-05 14:52:56,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 02:52:56" (3/3) ... [2025-02-05 14:52:56,892 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de32.c [2025-02-05 14:52:56,903 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 14:52:56,905 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de32.c that has 1 procedures, 12 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-05 14:52:56,937 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 14:52:56,944 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;@5a9cac7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 14:52:56,944 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 14:52:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) 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) [2025-02-05 14:52:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 14:52:56,949 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:56,950 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:56,950 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:56,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1712277688, now seen corresponding path program 1 times [2025-02-05 14:52:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:56,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100538256] [2025-02-05 14:52:56,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:56,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 14:52:57,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 14:52:57,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:57,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:57,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:57,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100538256] [2025-02-05 14:52:57,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100538256] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:52:57,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:52:57,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 14:52:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401950115] [2025-02-05 14:52:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:57,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:52:57,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:57,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:52:57,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:52:57,151 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2025-02-05 14:52:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:57,177 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2025-02-05 14:52:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:52:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2025-02-05 14:52:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:57,182 INFO L225 Difference]: With dead ends: 21 [2025-02-05 14:52:57,182 INFO L226 Difference]: Without dead ends: 10 [2025-02-05 14:52:57,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:52:57,185 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 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 [2025-02-05 14:52:57,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-05 14:52:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-05 14:52:57,200 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) [2025-02-05 14:52:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2025-02-05 14:52:57,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2025-02-05 14:52:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:57,203 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2025-02-05 14:52:57,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2025-02-05 14:52:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2025-02-05 14:52:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-05 14:52:57,204 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:57,204 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:57,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 14:52:57,204 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:57,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1541832966, now seen corresponding path program 1 times [2025-02-05 14:52:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:57,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175250476] [2025-02-05 14:52:57,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:57,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:57,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 14:52:57,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 14:52:57,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:57,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:57,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:57,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175250476] [2025-02-05 14:52:57,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175250476] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 14:52:57,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 14:52:57,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 14:52:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901555855] [2025-02-05 14:52:57,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:57,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:52:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:57,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:52:57,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 14:52:57,279 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) [2025-02-05 14:52:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:57,328 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2025-02-05 14:52:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:52:57,328 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 [2025-02-05 14:52:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:57,329 INFO L225 Difference]: With dead ends: 18 [2025-02-05 14:52:57,329 INFO L226 Difference]: Without dead ends: 11 [2025-02-05 14:52:57,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-05 14:52:57,331 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 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 [2025-02-05 14:52:57,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-05 14:52:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-05 14:52:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2025-02-05 14:52:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2025-02-05 14:52:57,337 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2025-02-05 14:52:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:57,338 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2025-02-05 14:52:57,338 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) [2025-02-05 14:52:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2025-02-05 14:52:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 14:52:57,339 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:57,339 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:57,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 14:52:57,340 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:57,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 391748103, now seen corresponding path program 1 times [2025-02-05 14:52:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354934424] [2025-02-05 14:52:57,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:57,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:57,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:57,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:57,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:57,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:57,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354934424] [2025-02-05 14:52:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354934424] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:57,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383589391] [2025-02-05 14:52:57,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:57,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:57,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:57,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 14:52:57,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:57,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:57,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:57,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:57,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:52:57,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:52:57,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383589391] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:57,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:52:57,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2025-02-05 14:52:57,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342295688] [2025-02-05 14:52:57,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:57,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:52:57,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:57,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:52:57,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:52:57,598 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:57,624 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2025-02-05 14:52:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:52:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 14:52:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:57,625 INFO L225 Difference]: With dead ends: 15 [2025-02-05 14:52:57,625 INFO L226 Difference]: Without dead ends: 12 [2025-02-05 14:52:57,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:52:57,626 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:57,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-02-05 14:52:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2025-02-05 14:52:57,628 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) [2025-02-05 14:52:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-02-05 14:52:57,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 9 [2025-02-05 14:52:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:57,628 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-02-05 14:52:57,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-02-05 14:52:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-05 14:52:57,631 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:57,631 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:57,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 14:52:57,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:57,836 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:57,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 392612042, now seen corresponding path program 1 times [2025-02-05 14:52:57,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:57,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998375546] [2025-02-05 14:52:57,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:57,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:57,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:57,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:57,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:57,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998375546] [2025-02-05 14:52:57,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998375546] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26278789] [2025-02-05 14:52:57,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:57,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:57,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:57,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 14:52:57,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-05 14:52:57,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-05 14:52:57,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:57,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:57,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:52:57,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:57,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26278789] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-05 14:52:58,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2025-02-05 14:52:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543151932] [2025-02-05 14:52:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 14:52:58,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 14:52:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:58,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 14:52:58,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:52:58,016 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:58,028 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2025-02-05 14:52:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 14:52:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-05 14:52:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:58,029 INFO L225 Difference]: With dead ends: 16 [2025-02-05 14:52:58,029 INFO L226 Difference]: Without dead ends: 11 [2025-02-05 14:52:58,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:52:58,030 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:58,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-02-05 14:52:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-02-05 14:52:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2025-02-05 14:52:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-02-05 14:52:58,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2025-02-05 14:52:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:58,033 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-02-05 14:52:58,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-02-05 14:52:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-05 14:52:58,033 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:58,033 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:58,039 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 [2025-02-05 14:52:58,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:58,235 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:58,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash -740678946, now seen corresponding path program 1 times [2025-02-05 14:52:58,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:58,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822461310] [2025-02-05 14:52:58,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:58,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 14:52:58,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 14:52:58,245 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:58,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822461310] [2025-02-05 14:52:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822461310] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741273161] [2025-02-05 14:52:58,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 14:52:58,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:58,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:58,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 14:52:58,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-05 14:52:58,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-05 14:52:58,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:52:58,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:58,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 14:52:58,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741273161] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:58,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:58,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-02-05 14:52:58,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986101720] [2025-02-05 14:52:58,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:58,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:52:58,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:58,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:52:58,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:52:58,433 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2025-02-05 14:52:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:58,460 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2025-02-05 14:52:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 14:52:58,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) Word has length 10 [2025-02-05 14:52:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:58,461 INFO L225 Difference]: With dead ends: 17 [2025-02-05 14:52:58,461 INFO L226 Difference]: Without dead ends: 14 [2025-02-05 14:52:58,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:52:58,462 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:58,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-02-05 14:52:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2025-02-05 14:52:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:52:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2025-02-05 14:52:58,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2025-02-05 14:52:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:58,465 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2025-02-05 14:52:58,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2025-02-05 14:52:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2025-02-05 14:52:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 14:52:58,466 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:58,466 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:58,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 14:52:58,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:58,667 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:58,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1512961206, now seen corresponding path program 2 times [2025-02-05 14:52:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347727386] [2025-02-05 14:52:58,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:52:58,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:58,672 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-05 14:52:58,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:52:58,682 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:52:58,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:58,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347727386] [2025-02-05 14:52:58,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347727386] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:58,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317438633] [2025-02-05 14:52:58,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:52:58,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:58,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:58,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:58,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 14:52:58,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-02-05 14:52:58,798 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 14:52:58,798 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:52:58,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:58,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 14:52:58,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-05 14:52:58,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317438633] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:58,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:58,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2025-02-05 14:52:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741116885] [2025-02-05 14:52:58,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:58,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 14:52:58,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:58,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 14:52:58,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:52:58,881 INFO L87 Difference]: Start difference. First operand 13 states and 16 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) [2025-02-05 14:52:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:58,933 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2025-02-05 14:52:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 14:52:58,934 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 11 [2025-02-05 14:52:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:58,935 INFO L225 Difference]: With dead ends: 37 [2025-02-05 14:52:58,935 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 14:52:58,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:52:58,936 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:58,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 14:52:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 13. [2025-02-05 14:52:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2025-02-05 14:52:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2025-02-05 14:52:58,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2025-02-05 14:52:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:58,940 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2025-02-05 14:52:58,940 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) [2025-02-05 14:52:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2025-02-05 14:52:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 14:52:58,940 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:58,940 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:58,946 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 [2025-02-05 14:52:59,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 14:52:59,144 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:59,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:59,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2021040826, now seen corresponding path program 3 times [2025-02-05 14:52:59,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:59,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603276536] [2025-02-05 14:52:59,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:52:59,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:59,149 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 12 statements into 2 equivalence classes. [2025-02-05 14:52:59,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:52:59,152 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 14:52:59,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:59,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603276536] [2025-02-05 14:52:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603276536] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113734187] [2025-02-05 14:52:59,213 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:52:59,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:59,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:59,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 14:52:59,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 12 statements into 2 equivalence classes. [2025-02-05 14:52:59,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 14:52:59,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-05 14:52:59,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 14:52:59,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:59,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:59,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113734187] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:59,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:59,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2025-02-05 14:52:59,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556148741] [2025-02-05 14:52:59,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:59,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:52:59,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:59,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:52:59,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:52:59,320 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2025-02-05 14:52:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:59,384 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2025-02-05 14:52:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 14:52:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 12 [2025-02-05 14:52:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:59,384 INFO L225 Difference]: With dead ends: 31 [2025-02-05 14:52:59,385 INFO L226 Difference]: Without dead ends: 23 [2025-02-05 14:52:59,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-02-05 14:52:59,385 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:52:59,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-05 14:52:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-05 14:52:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2025-02-05 14:52:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2025-02-05 14:52:59,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2025-02-05 14:52:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:59,391 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2025-02-05 14:52:59,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2025-02-05 14:52:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2025-02-05 14:52:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-05 14:52:59,391 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:59,391 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:59,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 14:52:59,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:59,592 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:52:59,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:52:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1692509832, now seen corresponding path program 4 times [2025-02-05 14:52:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:52:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360239273] [2025-02-05 14:52:59,593 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:52:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:52:59,596 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 13 statements into 2 equivalence classes. [2025-02-05 14:52:59,601 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 14:52:59,602 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:52:59,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:52:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360239273] [2025-02-05 14:52:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360239273] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:52:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059749459] [2025-02-05 14:52:59,675 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:52:59,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:52:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:52:59,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:52:59,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 14:52:59,700 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 13 statements into 2 equivalence classes. [2025-02-05 14:52:59,707 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-05 14:52:59,707 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:52:59,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:52:59,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 14:52:59,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:52:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:59,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:52:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:52:59,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059749459] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:52:59,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:52:59,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2025-02-05 14:52:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744324489] [2025-02-05 14:52:59,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:52:59,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 14:52:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:52:59,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 14:52:59,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:52:59,763 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2025-02-05 14:52:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:52:59,794 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2025-02-05 14:52:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 14:52:59,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) Word has length 13 [2025-02-05 14:52:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:52:59,795 INFO L225 Difference]: With dead ends: 33 [2025-02-05 14:52:59,795 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 14:52:59,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 14:52:59,796 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 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 [2025-02-05 14:52:59,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:52:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 14:52:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2025-02-05 14:52:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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) [2025-02-05 14:52:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2025-02-05 14:52:59,802 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 13 [2025-02-05 14:52:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:52:59,802 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2025-02-05 14:52:59,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2025-02-05 14:52:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2025-02-05 14:52:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 14:52:59,803 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:52:59,803 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:52:59,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 14:53:00,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 14:53:00,004 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:00,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:00,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2087689016, now seen corresponding path program 5 times [2025-02-05 14:53:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:00,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358032516] [2025-02-05 14:53:00,005 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:00,009 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 3 equivalence classes. [2025-02-05 14:53:00,022 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 14:53:00,022 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-05 14:53:00,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 14:53:00,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358032516] [2025-02-05 14:53:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358032516] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387345347] [2025-02-05 14:53:00,123 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:00,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:00,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:00,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 14:53:00,154 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 3 equivalence classes. [2025-02-05 14:53:00,165 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 14:53:00,165 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-05 14:53:00,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:00,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 14:53:00,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:53:00,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 14:53:00,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387345347] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:00,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:00,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2025-02-05 14:53:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915860274] [2025-02-05 14:53:00,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:00,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 14:53:00,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:00,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 14:53:00,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2025-02-05 14:53:00,367 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2025-02-05 14:53:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:00,645 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2025-02-05 14:53:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 14:53:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 15 [2025-02-05 14:53:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:00,646 INFO L225 Difference]: With dead ends: 44 [2025-02-05 14:53:00,646 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 14:53:00,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:53:00,646 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:00,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 14:53:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2025-02-05 14:53:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2025-02-05 14:53:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2025-02-05 14:53:00,652 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2025-02-05 14:53:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:00,652 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2025-02-05 14:53:00,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2025-02-05 14:53:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2025-02-05 14:53:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-05 14:53:00,652 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:00,652 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:00,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:00,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,857 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:00,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 536328990, now seen corresponding path program 6 times [2025-02-05 14:53:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344553160] [2025-02-05 14:53:00,857 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:00,862 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-02-05 14:53:00,869 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:53:00,869 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 14:53:00,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:00,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:00,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344553160] [2025-02-05 14:53:00,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344553160] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:00,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475855290] [2025-02-05 14:53:00,969 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:00,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:00,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 14:53:00,994 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-02-05 14:53:01,002 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-02-05 14:53:01,003 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-05 14:53:01,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:01,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-05 14:53:01,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:01,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:01,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475855290] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:01,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:01,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-02-05 14:53:01,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411742684] [2025-02-05 14:53:01,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:01,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 14:53:01,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:01,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 14:53:01,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:53:01,098 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:01,140 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2025-02-05 14:53:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 14:53:01,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-02-05 14:53:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:01,140 INFO L225 Difference]: With dead ends: 34 [2025-02-05 14:53:01,140 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 14:53:01,141 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-05 14:53:01,141 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 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 [2025-02-05 14:53:01,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:53:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 14:53:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2025-02-05 14:53:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2025-02-05 14:53:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2025-02-05 14:53:01,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2025-02-05 14:53:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:01,149 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2025-02-05 14:53:01,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2025-02-05 14:53:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-05 14:53:01,149 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:01,149 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:01,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:01,350 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 [2025-02-05 14:53:01,350 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:01,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -521441718, now seen corresponding path program 7 times [2025-02-05 14:53:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426354770] [2025-02-05 14:53:01,351 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:01,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-05 14:53:01,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:53:01,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:01,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:01,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426354770] [2025-02-05 14:53:01,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426354770] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360921653] [2025-02-05 14:53:01,473 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:01,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:01,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:01,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 14:53:01,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-05 14:53:01,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-05 14:53:01,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:01,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:01,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 14:53:01,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:01,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:01,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360921653] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:01,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:01,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2025-02-05 14:53:01,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839205770] [2025-02-05 14:53:01,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:01,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 14:53:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:01,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 14:53:01,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:53:01,670 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2025-02-05 14:53:02,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:02,367 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2025-02-05 14:53:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-05 14:53:02,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 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 17 [2025-02-05 14:53:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:02,367 INFO L225 Difference]: With dead ends: 79 [2025-02-05 14:53:02,367 INFO L226 Difference]: Without dead ends: 62 [2025-02-05 14:53:02,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2025-02-05 14:53:02,369 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:02,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 49 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-05 14:53:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2025-02-05 14:53:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2025-02-05 14:53:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-02-05 14:53:02,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 17 [2025-02-05 14:53:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:02,379 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-02-05 14:53:02,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2025-02-05 14:53:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-02-05 14:53:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 14:53:02,379 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:02,379 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:02,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-05 14:53:02,584 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 [2025-02-05 14:53:02,584 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:02,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1012167133, now seen corresponding path program 8 times [2025-02-05 14:53:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:02,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384642011] [2025-02-05 14:53:02,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:02,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-05 14:53:02,593 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:53:02,593 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:02,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-05 14:53:02,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384642011] [2025-02-05 14:53:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384642011] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775670447] [2025-02-05 14:53:02,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:02,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:02,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:02,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:02,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 14:53:02,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-02-05 14:53:02,813 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 14:53:02,813 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:02,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:02,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 14:53:02,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:02,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775670447] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:03,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 20 [2025-02-05 14:53:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464539120] [2025-02-05 14:53:03,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:03,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 14:53:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:03,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 14:53:03,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:53:03,118 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 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) [2025-02-05 14:53:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:03,373 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2025-02-05 14:53:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-05 14:53:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 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 [2025-02-05 14:53:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:03,374 INFO L225 Difference]: With dead ends: 81 [2025-02-05 14:53:03,374 INFO L226 Difference]: Without dead ends: 77 [2025-02-05 14:53:03,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2025-02-05 14:53:03,375 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:03,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-02-05 14:53:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 42. [2025-02-05 14:53:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 14:53:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2025-02-05 14:53:03,396 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 18 [2025-02-05 14:53:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:03,396 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2025-02-05 14:53:03,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 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) [2025-02-05 14:53:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2025-02-05 14:53:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 14:53:03,397 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:03,397 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:03,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 14:53:03,597 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 [2025-02-05 14:53:03,597 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:03,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:03,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1312441800, now seen corresponding path program 9 times [2025-02-05 14:53:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759781849] [2025-02-05 14:53:03,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:03,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:03,604 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-02-05 14:53:03,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:53:03,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:53:03,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:03,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:03,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759781849] [2025-02-05 14:53:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759781849] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:03,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821319849] [2025-02-05 14:53:03,721 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:03,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:03,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:03,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:03,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 14:53:03,743 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-02-05 14:53:03,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:53:03,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 14:53:03,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:03,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 14:53:03,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:03,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821319849] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:03,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-05 14:53:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730491667] [2025-02-05 14:53:03,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:03,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 14:53:03,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:03,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 14:53:03,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:53:03,930 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2025-02-05 14:53:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:04,004 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2025-02-05 14:53:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 14:53:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 [2025-02-05 14:53:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:04,006 INFO L225 Difference]: With dead ends: 68 [2025-02-05 14:53:04,006 INFO L226 Difference]: Without dead ends: 60 [2025-02-05 14:53:04,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-05 14:53:04,007 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 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 [2025-02-05 14:53:04,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 14:53:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-05 14:53:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2025-02-05 14:53:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 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) [2025-02-05 14:53:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2025-02-05 14:53:04,024 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 19 [2025-02-05 14:53:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:04,024 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2025-02-05 14:53:04,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2025-02-05 14:53:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2025-02-05 14:53:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 14:53:04,025 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:04,025 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:04,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:04,225 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 [2025-02-05 14:53:04,226 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:04,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2107351528, now seen corresponding path program 10 times [2025-02-05 14:53:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878164991] [2025-02-05 14:53:04,226 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:04,229 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-02-05 14:53:04,240 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:53:04,240 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:04,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:04,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:04,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878164991] [2025-02-05 14:53:04,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878164991] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:04,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237968715] [2025-02-05 14:53:04,333 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:04,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:04,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:04,334 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:04,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 14:53:04,356 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-02-05 14:53:04,365 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 14:53:04,365 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:04,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:04,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-05 14:53:04,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:04,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-05 14:53:04,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237968715] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:04,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2025-02-05 14:53:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691740221] [2025-02-05 14:53:04,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:04,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 14:53:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:04,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 14:53:04,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-02-05 14:53:04,520 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2025-02-05 14:53:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:04,913 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2025-02-05 14:53:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-05 14:53:04,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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 19 [2025-02-05 14:53:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:04,914 INFO L225 Difference]: With dead ends: 77 [2025-02-05 14:53:04,914 INFO L226 Difference]: Without dead ends: 66 [2025-02-05 14:53:04,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 14:53:04,915 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:04,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:53:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-05 14:53:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2025-02-05 14:53:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 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) [2025-02-05 14:53:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2025-02-05 14:53:04,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 19 [2025-02-05 14:53:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:04,933 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2025-02-05 14:53:04,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2025-02-05 14:53:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2025-02-05 14:53:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-05 14:53:04,934 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:04,934 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:04,942 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 [2025-02-05 14:53:05,134 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 [2025-02-05 14:53:05,134 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:05,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1265837574, now seen corresponding path program 11 times [2025-02-05 14:53:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:05,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792130309] [2025-02-05 14:53:05,135 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:05,138 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 4 equivalence classes. [2025-02-05 14:53:05,145 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:53:05,145 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 14:53:05,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:05,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:05,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792130309] [2025-02-05 14:53:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792130309] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031915452] [2025-02-05 14:53:05,280 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:05,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:05,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:05,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 14:53:05,314 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 4 equivalence classes. [2025-02-05 14:53:05,327 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 20 of 20 statements. [2025-02-05 14:53:05,328 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 14:53:05,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:05,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 14:53:05,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:05,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 14:53:05,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031915452] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:05,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:05,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2025-02-05 14:53:05,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928723503] [2025-02-05 14:53:05,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:05,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-05 14:53:05,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:05,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-05 14:53:05,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-02-05 14:53:05,616 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2025-02-05 14:53:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:05,991 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2025-02-05 14:53:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-05 14:53:05,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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 20 [2025-02-05 14:53:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:05,992 INFO L225 Difference]: With dead ends: 105 [2025-02-05 14:53:05,992 INFO L226 Difference]: Without dead ends: 91 [2025-02-05 14:53:05,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 14:53:05,994 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:05,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 67 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-02-05 14:53:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 48. [2025-02-05 14:53:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 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) [2025-02-05 14:53:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2025-02-05 14:53:06,012 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 20 [2025-02-05 14:53:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:06,012 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2025-02-05 14:53:06,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2025-02-05 14:53:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2025-02-05 14:53:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 14:53:06,013 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:06,013 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:06,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 14:53:06,231 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 [2025-02-05 14:53:06,231 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:06,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1906973858, now seen corresponding path program 12 times [2025-02-05 14:53:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:06,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628463664] [2025-02-05 14:53:06,231 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:06,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:06,239 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 4 equivalence classes. [2025-02-05 14:53:06,270 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:53:06,270 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-05 14:53:06,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:06,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:06,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628463664] [2025-02-05 14:53:06,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628463664] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:06,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781338454] [2025-02-05 14:53:06,460 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:06,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:06,462 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:06,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 14:53:06,483 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 4 equivalence classes. [2025-02-05 14:53:06,495 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:53:06,495 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-05 14:53:06,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:06,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 14:53:06,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:06,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:06,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781338454] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:06,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:06,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2025-02-05 14:53:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184861406] [2025-02-05 14:53:06,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:06,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 14:53:06,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:06,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 14:53:06,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-05 14:53:06,718 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2025-02-05 14:53:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:06,797 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2025-02-05 14:53:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 14:53:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 22 [2025-02-05 14:53:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:06,798 INFO L225 Difference]: With dead ends: 77 [2025-02-05 14:53:06,798 INFO L226 Difference]: Without dead ends: 68 [2025-02-05 14:53:06,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 15 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-05 14:53:06,798 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:06,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-05 14:53:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2025-02-05 14:53:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 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) [2025-02-05 14:53:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2025-02-05 14:53:06,827 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 22 [2025-02-05 14:53:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:06,827 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2025-02-05 14:53:06,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2025-02-05 14:53:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2025-02-05 14:53:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 14:53:06,828 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:06,828 INFO L218 NwaCegarLoop]: trace histogram [7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:06,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:07,028 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 [2025-02-05 14:53:07,028 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:07,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1792063358, now seen corresponding path program 13 times [2025-02-05 14:53:07,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:07,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290346718] [2025-02-05 14:53:07,029 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:07,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:07,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 14:53:07,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:53:07,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:07,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:07,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290346718] [2025-02-05 14:53:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290346718] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861969279] [2025-02-05 14:53:07,151 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:07,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:07,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:07,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:07,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 14:53:07,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-05 14:53:07,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 14:53:07,193 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:07,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:07,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-05 14:53:07,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:07,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-05 14:53:07,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861969279] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:07,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:07,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 26 [2025-02-05 14:53:07,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963054139] [2025-02-05 14:53:07,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:07,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 14:53:07,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:07,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 14:53:07,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2025-02-05 14:53:07,396 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2025-02-05 14:53:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:07,886 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2025-02-05 14:53:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-05 14:53:07,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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 [2025-02-05 14:53:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:07,887 INFO L225 Difference]: With dead ends: 79 [2025-02-05 14:53:07,887 INFO L226 Difference]: Without dead ends: 65 [2025-02-05 14:53:07,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:53:07,887 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:07,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 76 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:53:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-05 14:53:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2025-02-05 14:53:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 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) [2025-02-05 14:53:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2025-02-05 14:53:07,908 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 22 [2025-02-05 14:53:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:07,908 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2025-02-05 14:53:07,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2025-02-05 14:53:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2025-02-05 14:53:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 14:53:07,909 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:07,909 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:07,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:08,109 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 [2025-02-05 14:53:08,110 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:08,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1889956170, now seen corresponding path program 14 times [2025-02-05 14:53:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:08,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524016670] [2025-02-05 14:53:08,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:08,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-05 14:53:08,121 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:53:08,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:08,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:08,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:08,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524016670] [2025-02-05 14:53:08,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524016670] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:08,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164250026] [2025-02-05 14:53:08,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:08,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:08,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:08,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 14:53:08,286 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-05 14:53:08,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 14:53:08,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:08,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:08,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 14:53:08,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:08,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164250026] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:08,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2025-02-05 14:53:08,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894107660] [2025-02-05 14:53:08,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:08,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 14:53:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:08,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 14:53:08,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2025-02-05 14:53:08,555 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2025-02-05 14:53:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:10,928 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2025-02-05 14:53:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2025-02-05 14:53:10,928 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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 23 [2025-02-05 14:53:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:10,930 INFO L225 Difference]: With dead ends: 134 [2025-02-05 14:53:10,930 INFO L226 Difference]: Without dead ends: 111 [2025-02-05 14:53:10,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1188, Invalid=6644, Unknown=0, NotChecked=0, Total=7832 [2025-02-05 14:53:10,935 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 205 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:10,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 73 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-02-05 14:53:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2025-02-05 14:53:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 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) [2025-02-05 14:53:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2025-02-05 14:53:10,970 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 23 [2025-02-05 14:53:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:10,970 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2025-02-05 14:53:10,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2025-02-05 14:53:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2025-02-05 14:53:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 14:53:10,971 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:10,971 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:10,977 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 [2025-02-05 14:53:11,171 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 [2025-02-05 14:53:11,172 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:11,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1703766776, now seen corresponding path program 15 times [2025-02-05 14:53:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744640801] [2025-02-05 14:53:11,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:11,175 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-05 14:53:11,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 14:53:11,186 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:53:11,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:53:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744640801] [2025-02-05 14:53:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744640801] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826336702] [2025-02-05 14:53:11,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:11,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:11,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:11,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 14:53:11,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-02-05 14:53:11,365 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 14:53:11,365 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:53:11,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:11,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 14:53:11,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:53:11,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:53:11,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826336702] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:11,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:11,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2025-02-05 14:53:11,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580408038] [2025-02-05 14:53:11,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:11,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 14:53:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:11,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 14:53:11,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:53:11,510 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2025-02-05 14:53:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:11,629 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2025-02-05 14:53:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 14:53:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 [2025-02-05 14:53:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:11,629 INFO L225 Difference]: With dead ends: 97 [2025-02-05 14:53:11,629 INFO L226 Difference]: Without dead ends: 87 [2025-02-05 14:53:11,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 16 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2025-02-05 14:53:11,630 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 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 [2025-02-05 14:53:11,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-02-05 14:53:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2025-02-05 14:53:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.225) internal successors, (98), 80 states have internal predecessors, (98), 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) [2025-02-05 14:53:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2025-02-05 14:53:11,663 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 25 [2025-02-05 14:53:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:11,663 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2025-02-05 14:53:11,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2025-02-05 14:53:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2025-02-05 14:53:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-05 14:53:11,664 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:11,664 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:11,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:11,865 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 [2025-02-05 14:53:11,865 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:11,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash 126793594, now seen corresponding path program 16 times [2025-02-05 14:53:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18845749] [2025-02-05 14:53:11,865 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:11,868 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-05 14:53:11,873 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:53:11,873 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:11,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:53:12,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:12,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18845749] [2025-02-05 14:53:12,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18845749] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:12,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089433506] [2025-02-05 14:53:12,000 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:12,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:12,003 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:12,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 14:53:12,028 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-05 14:53:12,040 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-05 14:53:12,040 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:12,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:12,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-05 14:53:12,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:53:12,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:53:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089433506] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:12,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:12,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 32 [2025-02-05 14:53:12,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080958082] [2025-02-05 14:53:12,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:12,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 14:53:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:12,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 14:53:12,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2025-02-05 14:53:12,369 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2025-02-05 14:53:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:16,334 INFO L93 Difference]: Finished difference Result 188 states and 230 transitions. [2025-02-05 14:53:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-02-05 14:53:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 [2025-02-05 14:53:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:16,336 INFO L225 Difference]: With dead ends: 188 [2025-02-05 14:53:16,336 INFO L226 Difference]: Without dead ends: 157 [2025-02-05 14:53:16,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3718 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1949, Invalid=10933, Unknown=0, NotChecked=0, Total=12882 [2025-02-05 14:53:16,339 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 308 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:16,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 81 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:53:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-02-05 14:53:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 83. [2025-02-05 14:53:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 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) [2025-02-05 14:53:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2025-02-05 14:53:16,379 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 26 [2025-02-05 14:53:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:16,379 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2025-02-05 14:53:16,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2025-02-05 14:53:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2025-02-05 14:53:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 14:53:16,379 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:16,379 INFO L218 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:16,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:16,584 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 [2025-02-05 14:53:16,584 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:16,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:16,584 INFO L85 PathProgramCache]: Analyzing trace with hash -174629398, now seen corresponding path program 17 times [2025-02-05 14:53:16,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:16,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305613245] [2025-02-05 14:53:16,584 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:16,590 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 7 equivalence classes. [2025-02-05 14:53:16,604 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:53:16,604 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-05 14:53:16,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:16,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305613245] [2025-02-05 14:53:16,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305613245] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125929854] [2025-02-05 14:53:16,835 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:16,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:16,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-05 14:53:16,861 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 7 equivalence classes. [2025-02-05 14:53:16,891 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 14:53:16,892 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-05 14:53:16,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:16,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-05 14:53:16,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:17,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:53:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125929854] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:17,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 12] total 34 [2025-02-05 14:53:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905035626] [2025-02-05 14:53:17,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:17,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-05 14:53:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:17,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-05 14:53:17,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 14:53:17,339 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2025-02-05 14:53:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:18,773 INFO L93 Difference]: Finished difference Result 152 states and 186 transitions. [2025-02-05 14:53:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-02-05 14:53:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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 27 [2025-02-05 14:53:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:18,774 INFO L225 Difference]: With dead ends: 152 [2025-02-05 14:53:18,774 INFO L226 Difference]: Without dead ends: 138 [2025-02-05 14:53:18,775 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=525, Invalid=4167, Unknown=0, NotChecked=0, Total=4692 [2025-02-05 14:53:18,775 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:18,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 115 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:53:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-05 14:53:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2025-02-05 14:53:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 114 states have internal predecessors, (135), 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) [2025-02-05 14:53:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2025-02-05 14:53:18,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 27 [2025-02-05 14:53:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:18,835 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2025-02-05 14:53:18,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2025-02-05 14:53:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2025-02-05 14:53:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 14:53:18,835 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:18,835 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:18,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:19,035 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 [2025-02-05 14:53:19,036 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:19,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 64789406, now seen corresponding path program 18 times [2025-02-05 14:53:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:19,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790532298] [2025-02-05 14:53:19,036 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:19,039 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-05 14:53:19,061 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:53:19,061 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:53:19,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:53:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790532298] [2025-02-05 14:53:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790532298] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147184275] [2025-02-05 14:53:19,211 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:19,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:19,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:19,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:19,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-05 14:53:19,249 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 5 equivalence classes. [2025-02-05 14:53:19,281 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 14:53:19,281 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 14:53:19,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:19,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-05 14:53:19,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:53:19,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:53:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147184275] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:19,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2025-02-05 14:53:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621798299] [2025-02-05 14:53:19,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:19,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 14:53:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:19,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 14:53:19,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:53:19,495 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2025-02-05 14:53:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:19,748 INFO L93 Difference]: Finished difference Result 141 states and 165 transitions. [2025-02-05 14:53:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 14:53:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) Word has length 28 [2025-02-05 14:53:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:19,748 INFO L225 Difference]: With dead ends: 141 [2025-02-05 14:53:19,748 INFO L226 Difference]: Without dead ends: 130 [2025-02-05 14:53:19,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2025-02-05 14:53:19,749 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:19,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 14:53:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-02-05 14:53:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2025-02-05 14:53:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 122 states have internal predecessors, (145), 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) [2025-02-05 14:53:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2025-02-05 14:53:19,818 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 28 [2025-02-05 14:53:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:19,818 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2025-02-05 14:53:19,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2025-02-05 14:53:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2025-02-05 14:53:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 14:53:19,818 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:19,818 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:19,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:20,023 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 [2025-02-05 14:53:20,023 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:20,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1714482102, now seen corresponding path program 19 times [2025-02-05 14:53:20,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:20,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699801156] [2025-02-05 14:53:20,023 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:20,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 14:53:20,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:53:20,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:20,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:53:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699801156] [2025-02-05 14:53:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699801156] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032592388] [2025-02-05 14:53:20,291 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:20,292 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:20,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-05 14:53:20,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 14:53:20,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 14:53:20,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:20,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:20,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 14:53:20,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:53:20,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:53:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032592388] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:20,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:20,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2025-02-05 14:53:20,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523123235] [2025-02-05 14:53:20,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:20,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-05 14:53:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:20,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-05 14:53:20,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 14:53:20,766 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2025-02-05 14:53:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:27,905 INFO L93 Difference]: Finished difference Result 265 states and 316 transitions. [2025-02-05 14:53:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2025-02-05 14:53:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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 29 [2025-02-05 14:53:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:27,907 INFO L225 Difference]: With dead ends: 265 [2025-02-05 14:53:27,907 INFO L226 Difference]: Without dead ends: 224 [2025-02-05 14:53:27,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6257 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3033, Invalid=16989, Unknown=0, NotChecked=0, Total=20022 [2025-02-05 14:53:27,910 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 447 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:27,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 97 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:53:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-02-05 14:53:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 132. [2025-02-05 14:53:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 131 states have internal predecessors, (157), 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) [2025-02-05 14:53:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2025-02-05 14:53:27,982 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 29 [2025-02-05 14:53:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:27,982 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2025-02-05 14:53:27,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2025-02-05 14:53:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2025-02-05 14:53:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 14:53:27,983 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:27,983 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:27,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:28,185 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 [2025-02-05 14:53:28,185 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:28,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash 587371592, now seen corresponding path program 20 times [2025-02-05 14:53:28,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:28,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546526212] [2025-02-05 14:53:28,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:28,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:28,189 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-05 14:53:28,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 14:53:28,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:28,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:53:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546526212] [2025-02-05 14:53:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546526212] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396741796] [2025-02-05 14:53:28,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:53:28,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:28,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:28,388 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:28,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-05 14:53:28,414 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-05 14:53:28,428 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 14:53:28,428 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:53:28,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:28,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-05 14:53:28,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:53:28,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:53:28,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396741796] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:28,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:28,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2025-02-05 14:53:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676967111] [2025-02-05 14:53:28,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:28,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 14:53:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:28,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 14:53:28,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:53:28,601 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2025-02-05 14:53:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:28,792 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2025-02-05 14:53:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 14:53:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 31 [2025-02-05 14:53:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:28,793 INFO L225 Difference]: With dead ends: 160 [2025-02-05 14:53:28,794 INFO L226 Difference]: Without dead ends: 148 [2025-02-05 14:53:28,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-02-05 14:53:28,794 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:28,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 79 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-02-05 14:53:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2025-02-05 14:53:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 139 states have internal predecessors, (167), 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) [2025-02-05 14:53:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2025-02-05 14:53:28,882 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 31 [2025-02-05 14:53:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:28,882 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2025-02-05 14:53:28,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2025-02-05 14:53:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2025-02-05 14:53:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 14:53:28,883 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:28,883 INFO L218 NwaCegarLoop]: trace histogram [13, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:28,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-05 14:53:29,086 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 [2025-02-05 14:53:29,087 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:29,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -937615897, now seen corresponding path program 21 times [2025-02-05 14:53:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660049120] [2025-02-05 14:53:29,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:29,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 8 equivalence classes. [2025-02-05 14:53:29,099 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 31 statements. [2025-02-05 14:53:29,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:53:29,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 14:53:29,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:29,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660049120] [2025-02-05 14:53:29,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660049120] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:29,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941555821] [2025-02-05 14:53:29,256 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:53:29,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:29,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:29,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-05 14:53:29,283 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 8 equivalence classes. [2025-02-05 14:53:29,296 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 24 of 31 statements. [2025-02-05 14:53:29,296 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 14:53:29,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:29,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 14:53:29,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 14:53:29,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-02-05 14:53:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941555821] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:29,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:29,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2025-02-05 14:53:29,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160293761] [2025-02-05 14:53:29,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:29,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 14:53:29,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:29,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 14:53:29,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:53:29,503 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2025-02-05 14:53:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:29,728 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2025-02-05 14:53:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:53:29,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 31 [2025-02-05 14:53:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:29,730 INFO L225 Difference]: With dead ends: 149 [2025-02-05 14:53:29,731 INFO L226 Difference]: Without dead ends: 139 [2025-02-05 14:53:29,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-02-05 14:53:29,731 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:29,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-02-05 14:53:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 133. [2025-02-05 14:53:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 132 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) [2025-02-05 14:53:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2025-02-05 14:53:29,830 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 31 [2025-02-05 14:53:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:29,831 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2025-02-05 14:53:29,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2025-02-05 14:53:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2025-02-05 14:53:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 14:53:29,831 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:29,832 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:29,837 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 [2025-02-05 14:53:30,032 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 [2025-02-05 14:53:30,033 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:30,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1580250362, now seen corresponding path program 22 times [2025-02-05 14:53:30,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:30,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128434289] [2025-02-05 14:53:30,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:30,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:30,037 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-05 14:53:30,050 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:53:30,050 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:30,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:53:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128434289] [2025-02-05 14:53:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128434289] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440907449] [2025-02-05 14:53:30,253 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:53:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:30,255 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-05 14:53:30,284 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-05 14:53:30,299 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 14:53:30,299 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:53:30,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:30,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-02-05 14:53:30,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:53:30,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 14:53:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440907449] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:30,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:30,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2025-02-05 14:53:30,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312803498] [2025-02-05 14:53:30,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:30,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-05 14:53:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:30,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-05 14:53:30,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 14:53:30,776 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2025-02-05 14:53:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:41,646 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2025-02-05 14:53:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2025-02-05 14:53:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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 [2025-02-05 14:53:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:41,647 INFO L225 Difference]: With dead ends: 310 [2025-02-05 14:53:41,647 INFO L226 Difference]: Without dead ends: 262 [2025-02-05 14:53:41,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9907 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2025-02-05 14:53:41,649 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 646 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:41,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 75 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 14:53:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2025-02-05 14:53:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 136. [2025-02-05 14:53:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2) internal successors, (162), 135 states have internal predecessors, (162), 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) [2025-02-05 14:53:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2025-02-05 14:53:41,727 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 32 [2025-02-05 14:53:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:41,727 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2025-02-05 14:53:41,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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) [2025-02-05 14:53:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2025-02-05 14:53:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 14:53:41,728 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:41,728 INFO L218 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:41,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-05 14:53:41,932 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 [2025-02-05 14:53:41,932 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:41,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1494570282, now seen corresponding path program 23 times [2025-02-05 14:53:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:41,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995385699] [2025-02-05 14:53:41,932 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:41,935 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 9 equivalence classes. [2025-02-05 14:53:41,949 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:53:41,949 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-05 14:53:41,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 14:53:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995385699] [2025-02-05 14:53:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995385699] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850527103] [2025-02-05 14:53:42,229 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:53:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:42,236 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:42,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-05 14:53:42,267 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 9 equivalence classes. [2025-02-05 14:53:42,415 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 14:53:42,415 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-05 14:53:42,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:42,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-02-05 14:53:42,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:53:42,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-05 14:53:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850527103] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:42,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:42,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 14] total 43 [2025-02-05 14:53:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735738932] [2025-02-05 14:53:42,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:42,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-05 14:53:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:42,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-05 14:53:42,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1441, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 14:53:42,826 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 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) [2025-02-05 14:53:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:44,143 INFO L93 Difference]: Finished difference Result 313 states and 376 transitions. [2025-02-05 14:53:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-02-05 14:53:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 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 [2025-02-05 14:53:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:44,144 INFO L225 Difference]: With dead ends: 313 [2025-02-05 14:53:44,144 INFO L226 Difference]: Without dead ends: 302 [2025-02-05 14:53:44,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1528, Invalid=4792, Unknown=0, NotChecked=0, Total=6320 [2025-02-05 14:53:44,145 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:44,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 165 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 14:53:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2025-02-05 14:53:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2025-02-05 14:53:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 166 states have internal predecessors, (195), 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) [2025-02-05 14:53:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2025-02-05 14:53:44,251 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 33 [2025-02-05 14:53:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:44,252 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2025-02-05 14:53:44,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 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) [2025-02-05 14:53:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2025-02-05 14:53:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-05 14:53:44,252 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:44,252 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:44,258 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 [2025-02-05 14:53:44,456 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 [2025-02-05 14:53:44,456 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:44,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 544465886, now seen corresponding path program 24 times [2025-02-05 14:53:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:44,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123978280] [2025-02-05 14:53:44,457 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:44,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:44,460 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 6 equivalence classes. [2025-02-05 14:53:44,479 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 34 of 34 statements. [2025-02-05 14:53:44,479 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-05 14:53:44,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 14:53:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123978280] [2025-02-05 14:53:44,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123978280] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524204801] [2025-02-05 14:53:44,760 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:53:44,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:44,762 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:44,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-05 14:53:44,793 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 6 equivalence classes. [2025-02-05 14:53:44,868 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 34 of 34 statements. [2025-02-05 14:53:44,869 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-02-05 14:53:44,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:44,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-05 14:53:44,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 14:53:44,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 14:53:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524204801] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:45,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:45,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2025-02-05 14:53:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937972107] [2025-02-05 14:53:45,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:45,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 14:53:45,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:45,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 14:53:45,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2025-02-05 14:53:45,056 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2025-02-05 14:53:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:53:45,311 INFO L93 Difference]: Finished difference Result 198 states and 231 transitions. [2025-02-05 14:53:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 14:53:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 34 [2025-02-05 14:53:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:53:45,313 INFO L225 Difference]: With dead ends: 198 [2025-02-05 14:53:45,313 INFO L226 Difference]: Without dead ends: 185 [2025-02-05 14:53:45,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2025-02-05 14:53:45,313 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:53:45,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 95 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:53:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-02-05 14:53:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2025-02-05 14:53:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.177142857142857) internal successors, (206), 175 states have internal predecessors, (206), 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) [2025-02-05 14:53:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 206 transitions. [2025-02-05 14:53:45,429 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 206 transitions. Word has length 34 [2025-02-05 14:53:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:53:45,429 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 206 transitions. [2025-02-05 14:53:45,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2025-02-05 14:53:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 206 transitions. [2025-02-05 14:53:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 14:53:45,429 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:53:45,429 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:53:45,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-02-05 14:53:45,629 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 [2025-02-05 14:53:45,630 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:53:45,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:53:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -382642358, now seen corresponding path program 25 times [2025-02-05 14:53:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:53:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834599273] [2025-02-05 14:53:45,630 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:45,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:53:45,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 14:53:45,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 14:53:45,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:45,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 14:53:45,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:53:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834599273] [2025-02-05 14:53:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834599273] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:53:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243399795] [2025-02-05 14:53:45,921 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:53:45,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:53:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:53:45,923 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:53:45,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-05 14:53:45,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 14:53:45,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 14:53:45,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:53:45,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:53:45,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-05 14:53:45,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:53:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 14:53:46,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:53:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 14:53:46,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243399795] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:53:46,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:53:46,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2025-02-05 14:53:46,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687604851] [2025-02-05 14:53:46,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:53:46,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-05 14:53:46,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:53:46,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-05 14:53:46,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2025-02-05 14:53:46,556 INFO L87 Difference]: Start difference. First operand 176 states and 206 transitions. Second operand has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 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) [2025-02-05 14:54:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:04,748 INFO L93 Difference]: Finished difference Result 413 states and 489 transitions. [2025-02-05 14:54:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2025-02-05 14:54:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 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) Word has length 35 [2025-02-05 14:54:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:04,749 INFO L225 Difference]: With dead ends: 413 [2025-02-05 14:54:04,750 INFO L226 Difference]: Without dead ends: 355 [2025-02-05 14:54:04,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14961 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2025-02-05 14:54:04,752 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 857 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:04,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 101 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 14:54:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2025-02-05 14:54:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 191. [2025-02-05 14:54:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1894736842105262) internal successors, (226), 190 states have internal predecessors, (226), 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) [2025-02-05 14:54:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 226 transitions. [2025-02-05 14:54:04,884 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 226 transitions. Word has length 35 [2025-02-05 14:54:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:04,884 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 226 transitions. [2025-02-05 14:54:04,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 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) [2025-02-05 14:54:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 226 transitions. [2025-02-05 14:54:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-05 14:54:04,885 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:04,885 INFO L218 NwaCegarLoop]: trace histogram [16, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:04,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-05 14:54:05,089 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 [2025-02-05 14:54:05,089 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:05,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 877172765, now seen corresponding path program 26 times [2025-02-05 14:54:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546697691] [2025-02-05 14:54:05,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:05,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-05 14:54:05,111 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 14:54:05,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:05,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546697691] [2025-02-05 14:54:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546697691] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743295487] [2025-02-05 14:54:05,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 14:54:05,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:05,327 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:05,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-02-05 14:54:05,356 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-02-05 14:54:05,381 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-05 14:54:05,381 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 14:54:05,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:05,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-02-05 14:54:05,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 14:54:05,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-05 14:54:05,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743295487] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:05,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:05,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 16] total 41 [2025-02-05 14:54:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646159794] [2025-02-05 14:54:05,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:05,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 14:54:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:05,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 14:54:05,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 14:54:05,878 INFO L87 Difference]: Start difference. First operand 191 states and 226 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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) [2025-02-05 14:54:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:09,811 INFO L93 Difference]: Finished difference Result 237 states and 288 transitions. [2025-02-05 14:54:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2025-02-05 14:54:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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 36 [2025-02-05 14:54:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:09,812 INFO L225 Difference]: With dead ends: 237 [2025-02-05 14:54:09,812 INFO L226 Difference]: Without dead ends: 219 [2025-02-05 14:54:09,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1074, Invalid=8238, Unknown=0, NotChecked=0, Total=9312 [2025-02-05 14:54:09,813 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:09,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 235 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 14:54:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2025-02-05 14:54:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 198. [2025-02-05 14:54:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1624365482233503) internal successors, (229), 197 states have internal predecessors, (229), 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) [2025-02-05 14:54:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 229 transitions. [2025-02-05 14:54:09,959 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 229 transitions. Word has length 36 [2025-02-05 14:54:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:09,959 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 229 transitions. [2025-02-05 14:54:09,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 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) [2025-02-05 14:54:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 229 transitions. [2025-02-05 14:54:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 14:54:09,960 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:09,960 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:09,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-02-05 14:54:10,160 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 [2025-02-05 14:54:10,161 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:10,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash -698203256, now seen corresponding path program 27 times [2025-02-05 14:54:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:10,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005213067] [2025-02-05 14:54:10,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:10,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:10,164 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 6 equivalence classes. [2025-02-05 14:54:10,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:54:10,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 14:54:10,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 14:54:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005213067] [2025-02-05 14:54:10,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005213067] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:10,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452918768] [2025-02-05 14:54:10,387 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 14:54:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:10,389 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:10,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-02-05 14:54:10,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 6 equivalence classes. [2025-02-05 14:54:10,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:54:10,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-05 14:54:10,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:10,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-05 14:54:10,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 14:54:10,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 14:54:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452918768] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:10,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 15 [2025-02-05 14:54:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503167116] [2025-02-05 14:54:10,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:10,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 14:54:10,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:10,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 14:54:10,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:54:10,751 INFO L87 Difference]: Start difference. First operand 198 states and 229 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2025-02-05 14:54:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:11,066 INFO L93 Difference]: Finished difference Result 226 states and 263 transitions. [2025-02-05 14:54:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 14:54:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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 [2025-02-05 14:54:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:11,067 INFO L225 Difference]: With dead ends: 226 [2025-02-05 14:54:11,067 INFO L226 Difference]: Without dead ends: 212 [2025-02-05 14:54:11,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 24 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2025-02-05 14:54:11,068 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:11,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 14:54:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-02-05 14:54:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2025-02-05 14:54:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1650485436893203) internal successors, (240), 206 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) [2025-02-05 14:54:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 240 transitions. [2025-02-05 14:54:11,217 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 240 transitions. Word has length 37 [2025-02-05 14:54:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:11,217 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 240 transitions. [2025-02-05 14:54:11,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2025-02-05 14:54:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 240 transitions. [2025-02-05 14:54:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-05 14:54:11,218 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:11,218 INFO L218 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:11,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-02-05 14:54:11,419 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 [2025-02-05 14:54:11,419 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:11,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 559873319, now seen corresponding path program 28 times [2025-02-05 14:54:11,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:11,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120587987] [2025-02-05 14:54:11,420 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:11,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:11,423 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-05 14:54:11,430 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:54:11,430 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:11,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-05 14:54:11,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120587987] [2025-02-05 14:54:11,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120587987] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:11,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106918558] [2025-02-05 14:54:11,752 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 14:54:11,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:11,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:11,754 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 14:54:11,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-02-05 14:54:11,781 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-02-05 14:54:11,797 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-05 14:54:11,798 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 14:54:11,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:11,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-02-05 14:54:11,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 14:54:11,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-02-05 14:54:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106918558] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:12,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:12,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 16] total 49 [2025-02-05 14:54:12,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190630890] [2025-02-05 14:54:12,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:12,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-05 14:54:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:12,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-05 14:54:12,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2025-02-05 14:54:12,370 INFO L87 Difference]: Start difference. First operand 207 states and 240 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 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) [2025-02-05 14:54:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:14,546 INFO L93 Difference]: Finished difference Result 409 states and 487 transitions. [2025-02-05 14:54:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-02-05 14:54:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 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 [2025-02-05 14:54:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:14,548 INFO L225 Difference]: With dead ends: 409 [2025-02-05 14:54:14,548 INFO L226 Difference]: Without dead ends: 397 [2025-02-05 14:54:14,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2025-02-05 14:54:14,551 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 223 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:14,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 220 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-05 14:54:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2025-02-05 14:54:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 209. [2025-02-05 14:54:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1586538461538463) internal successors, (241), 208 states have internal predecessors, (241), 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) [2025-02-05 14:54:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 241 transitions. [2025-02-05 14:54:14,707 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 241 transitions. Word has length 37 [2025-02-05 14:54:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:14,708 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 241 transitions. [2025-02-05 14:54:14,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 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) [2025-02-05 14:54:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 241 transitions. [2025-02-05 14:54:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 14:54:14,708 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:14,708 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:14,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-02-05 14:54:14,913 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 [2025-02-05 14:54:14,915 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:14,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1606865530, now seen corresponding path program 29 times [2025-02-05 14:54:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055670880] [2025-02-05 14:54:14,924 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:14,967 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 7 equivalence classes. [2025-02-05 14:54:14,995 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 14:54:14,996 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-05 14:54:14,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 14:54:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055670880] [2025-02-05 14:54:15,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055670880] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389362698] [2025-02-05 14:54:15,383 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 14:54:15,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:15,385 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) [2025-02-05 14:54:15,386 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 [2025-02-05 14:54:15,411 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 7 equivalence classes. [2025-02-05 14:54:15,523 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 14:54:15,524 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-05 14:54:15,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:15,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-02-05 14:54:15,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 14:54:15,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 14:54:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389362698] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:16,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:16,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 57 [2025-02-05 14:54:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990318375] [2025-02-05 14:54:16,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:16,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 14:54:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:16,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 14:54:16,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2696, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 14:54:16,449 INFO L87 Difference]: Start difference. First operand 209 states and 241 transitions. Second operand has 57 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 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) [2025-02-05 14:54:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:21,050 INFO L93 Difference]: Finished difference Result 451 states and 521 transitions. [2025-02-05 14:54:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2025-02-05 14:54:21,050 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 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) Word has length 38 [2025-02-05 14:54:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:21,053 INFO L225 Difference]: With dead ends: 451 [2025-02-05 14:54:21,054 INFO L226 Difference]: Without dead ends: 425 [2025-02-05 14:54:21,054 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2476, Invalid=9956, Unknown=0, NotChecked=0, Total=12432 [2025-02-05 14:54:21,056 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 276 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:21,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 140 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 14:54:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2025-02-05 14:54:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 241. [2025-02-05 14:54:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.1666666666666667) internal successors, (280), 240 states have internal predecessors, (280), 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) [2025-02-05 14:54:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 280 transitions. [2025-02-05 14:54:21,289 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 280 transitions. Word has length 38 [2025-02-05 14:54:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:21,289 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 280 transitions. [2025-02-05 14:54:21,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 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) [2025-02-05 14:54:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 280 transitions. [2025-02-05 14:54:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-05 14:54:21,290 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:21,290 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:21,301 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 [2025-02-05 14:54:21,490 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 [2025-02-05 14:54:21,491 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:21,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1090274274, now seen corresponding path program 30 times [2025-02-05 14:54:21,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:21,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532697604] [2025-02-05 14:54:21,495 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:54:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:21,498 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 40 statements into 7 equivalence classes. [2025-02-05 14:54:21,517 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 14:54:21,517 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-05 14:54:21,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:54:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532697604] [2025-02-05 14:54:21,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532697604] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405087319] [2025-02-05 14:54:21,751 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 14:54:21,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:21,753 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) [2025-02-05 14:54:21,755 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 [2025-02-05 14:54:21,783 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 40 statements into 7 equivalence classes. [2025-02-05 14:54:21,852 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 40 of 40 statements. [2025-02-05 14:54:21,852 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-05 14:54:21,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:21,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-05 14:54:21,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:54:21,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:54:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405087319] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:22,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:22,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2025-02-05 14:54:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450733714] [2025-02-05 14:54:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:22,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-05 14:54:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:22,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-05 14:54:22,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2025-02-05 14:54:22,348 INFO L87 Difference]: Start difference. First operand 241 states and 280 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2025-02-05 14:54:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 14:54:23,137 INFO L93 Difference]: Finished difference Result 433 states and 500 transitions. [2025-02-05 14:54:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 14:54:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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 40 [2025-02-05 14:54:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 14:54:23,146 INFO L225 Difference]: With dead ends: 433 [2025-02-05 14:54:23,146 INFO L226 Difference]: Without dead ends: 418 [2025-02-05 14:54:23,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 27 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2025-02-05 14:54:23,147 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 14:54:23,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 14:54:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2025-02-05 14:54:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 274. [2025-02-05 14:54:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.1831501831501832) internal successors, (323), 273 states have internal predecessors, (323), 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) [2025-02-05 14:54:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 323 transitions. [2025-02-05 14:54:23,442 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 323 transitions. Word has length 40 [2025-02-05 14:54:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 14:54:23,442 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 323 transitions. [2025-02-05 14:54:23,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 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) [2025-02-05 14:54:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 323 transitions. [2025-02-05 14:54:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 14:54:23,443 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 14:54:23,443 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 14:54:23,449 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 [2025-02-05 14:54:23,644 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 [2025-02-05 14:54:23,645 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 14:54:23,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 14:54:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash -208061878, now seen corresponding path program 31 times [2025-02-05 14:54:23,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 14:54:23,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712892186] [2025-02-05 14:54:23,645 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:54:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 14:54:23,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 14:54:23,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 14:54:23,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:23,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:54:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 14:54:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712892186] [2025-02-05 14:54:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712892186] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 14:54:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494569695] [2025-02-05 14:54:24,080 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 14:54:24,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 14:54:24,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 14:54:24,082 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) [2025-02-05 14:54:24,083 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 [2025-02-05 14:54:24,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 14:54:24,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 14:54:24,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 14:54:24,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 14:54:24,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-05 14:54:24,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 14:54:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:54:24,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 14:54:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-02-05 14:54:24,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494569695] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 14:54:24,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 14:54:24,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 52 [2025-02-05 14:54:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925042639] [2025-02-05 14:54:24,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 14:54:24,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-05 14:54:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 14:54:24,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-05 14:54:24,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 14:54:24,911 INFO L87 Difference]: Start difference. First operand 274 states and 323 transitions. Second operand has 52 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 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)