./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum4.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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 17:06:26,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 17:06:26,342 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 17:06:26,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 17:06:26,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 17:06:26,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 17:06:26,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 17:06:26,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 17:06:26,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 17:06:26,366 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 17:06:26,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 17:06:26,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 17:06:26,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 17:06:26,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 17:06:26,368 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 17:06:26,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 17:06:26,368 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 17:06:26,368 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 17:06:26,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 17:06:26,369 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 17:06:26,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:26,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 17:06:26,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 17:06:26,370 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 17:06:26,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 17:06:26,370 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 17:06:26,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 17:06:26,371 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 17:06:26,371 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 17:06:26,371 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 17:06:26,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 17:06:26,371 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 -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2025-02-07 17:06:26,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 17:06:26,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 17:06:26,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 17:06:26,603 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 17:06:26,604 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 17:06:26,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2025-02-07 17:06:27,766 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3bf1a11a4/7ef8468ac2f0413d8f0f3ae125a6ece0/FLAG2169fcd9f [2025-02-07 17:06:28,008 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 17:06:28,015 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2025-02-07 17:06:28,042 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3bf1a11a4/7ef8468ac2f0413d8f0f3ae125a6ece0/FLAG2169fcd9f [2025-02-07 17:06:28,357 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3bf1a11a4/7ef8468ac2f0413d8f0f3ae125a6ece0 [2025-02-07 17:06:28,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 17:06:28,359 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 17:06:28,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:28,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 17:06:28,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 17:06:28,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18cc3fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28, skipping insertion in model container [2025-02-07 17:06:28,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,376 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 17:06:28,467 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/array-crafted/zero_sum4.c[400,413] [2025-02-07 17:06:28,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:28,488 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 17:06:28,494 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/array-crafted/zero_sum4.c[400,413] [2025-02-07 17:06:28,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 17:06:28,508 INFO L204 MainTranslator]: Completed translation [2025-02-07 17:06:28,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28 WrapperNode [2025-02-07 17:06:28,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 17:06:28,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:28,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 17:06:28,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 17:06:28,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,526 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2025-02-07 17:06:28,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 17:06:28,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 17:06:28,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 17:06:28,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 17:06:28,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,536 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,547 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-07 17:06:28,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,551 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,551 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 17:06:28,555 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 17:06:28,555 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 17:06:28,555 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 17:06:28,556 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (1/1) ... [2025-02-07 17:06:28,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 17:06:28,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:28,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 17:06:28,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 17:06:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 17:06:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 17:06:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 17:06:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 17:06:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 17:06:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 17:06:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 17:06:28,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 17:06:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 17:06:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 17:06:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 17:06:28,655 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 17:06:28,656 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 17:06:28,777 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 17:06:28,778 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 17:06:28,783 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 17:06:28,784 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 17:06:28,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:28 BoogieIcfgContainer [2025-02-07 17:06:28,784 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 17:06:28,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 17:06:28,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 17:06:28,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 17:06:28,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 05:06:28" (1/3) ... [2025-02-07 17:06:28,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d560a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:28, skipping insertion in model container [2025-02-07 17:06:28,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 05:06:28" (2/3) ... [2025-02-07 17:06:28,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d560a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 05:06:28, skipping insertion in model container [2025-02-07 17:06:28,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 05:06:28" (3/3) ... [2025-02-07 17:06:28,792 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2025-02-07 17:06:28,801 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 17:06:28,802 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum4.c that has 1 procedures, 18 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2025-02-07 17:06:28,837 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 17:06:28,847 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;@543635a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 17:06:28,848 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 17:06:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-02-07 17:06:28,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:28,855 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:28,856 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:28,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1715680082, now seen corresponding path program 1 times [2025-02-07 17:06:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083389250] [2025-02-07 17:06:28,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:28,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-07 17:06:28,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-07 17:06:28,937 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:28,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:29,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:29,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083389250] [2025-02-07 17:06:29,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083389250] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:29,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:29,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 17:06:29,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190615341] [2025-02-07 17:06:29,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:29,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 17:06:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:29,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 17:06:29,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:29,099 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 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) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:29,138 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2025-02-07 17:06:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 17:06:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) Word has length 13 [2025-02-07 17:06:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:29,145 INFO L225 Difference]: With dead ends: 34 [2025-02-07 17:06:29,145 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 17:06:29,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 17:06:29,151 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:29,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 17:06:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-02-07 17:06:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2025-02-07 17:06:29,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 13 [2025-02-07 17:06:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:29,179 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2025-02-07 17:06:29,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2025-02-07 17:06:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 17:06:29,180 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:29,180 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:29,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 17:06:29,185 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:29,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash 495531285, now seen corresponding path program 1 times [2025-02-07 17:06:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:29,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201329741] [2025-02-07 17:06:29,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:29,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:29,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-07 17:06:29,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 17:06:29,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:29,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 17:06:29,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201329741] [2025-02-07 17:06:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201329741] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 17:06:29,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 17:06:29,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 17:06:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369990285] [2025-02-07 17:06:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 17:06:29,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 17:06:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:29,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 17:06:29,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:29,330 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:29,409 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2025-02-07 17:06:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 14 [2025-02-07 17:06:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:29,410 INFO L225 Difference]: With dead ends: 33 [2025-02-07 17:06:29,410 INFO L226 Difference]: Without dead ends: 23 [2025-02-07 17:06:29,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-07 17:06:29,411 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:29,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-07 17:06:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-02-07 17:06:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2025-02-07 17:06:29,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2025-02-07 17:06:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:29,416 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2025-02-07 17:06:29,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2025-02-07 17:06:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-07 17:06:29,419 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:29,419 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:29,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 17:06:29,420 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:29,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1928715755, now seen corresponding path program 1 times [2025-02-07 17:06:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642116227] [2025-02-07 17:06:29,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:29,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 17:06:29,444 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 17:06:29,444 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:29,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:06:29,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:29,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642116227] [2025-02-07 17:06:29,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642116227] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:29,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318212609] [2025-02-07 17:06:29,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 17:06:29,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:29,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:29,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:29,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 17:06:29,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 17:06:29,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 17:06:29,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:29,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:29,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:29,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:06:29,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 17:06:29,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318212609] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:29,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:29,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 17:06:29,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988720532] [2025-02-07 17:06:29,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:29,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 17:06:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:29,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 17:06:29,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:29,619 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:29,668 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2025-02-07 17:06:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 17:06:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 22 [2025-02-07 17:06:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:29,668 INFO L225 Difference]: With dead ends: 43 [2025-02-07 17:06:29,669 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 17:06:29,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-02-07 17:06:29,669 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:29,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 17:06:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 17:06:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-02-07 17:06:29,697 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 22 [2025-02-07 17:06:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:29,697 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-02-07 17:06:29,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-02-07 17:06:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 17:06:29,697 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:29,697 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:29,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 17:06:29,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:29,903 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:29,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1371587186, now seen corresponding path program 2 times [2025-02-07 17:06:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:29,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912623650] [2025-02-07 17:06:29,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:29,915 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-07 17:06:29,938 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:06:29,938 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:29,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:30,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:30,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912623650] [2025-02-07 17:06:30,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912623650] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:30,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597232776] [2025-02-07 17:06:30,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:30,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:30,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:30,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:30,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 17:06:30,073 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-07 17:06:30,093 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 17:06:30,093 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:30,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:30,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 17:06:30,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:30,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597232776] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:30,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:30,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 17:06:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608708316] [2025-02-07 17:06:30,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:30,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 17:06:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:30,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 17:06:30,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:30,165 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:30,224 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2025-02-07 17:06:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 17:06:30,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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 23 [2025-02-07 17:06:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:30,224 INFO L225 Difference]: With dead ends: 49 [2025-02-07 17:06:30,224 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 17:06:30,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-02-07 17:06:30,225 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:30,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 17:06:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-07 17:06:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2025-02-07 17:06:30,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2025-02-07 17:06:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:30,229 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2025-02-07 17:06:30,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2025-02-07 17:06:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 17:06:30,229 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:30,230 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:30,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:30,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:30,430 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:30,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:30,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1843024014, now seen corresponding path program 3 times [2025-02-07 17:06:30,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:30,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277058187] [2025-02-07 17:06:30,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:30,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-02-07 17:06:30,476 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:06:30,476 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:30,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:32,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:32,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277058187] [2025-02-07 17:06:32,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277058187] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:32,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699514501] [2025-02-07 17:06:32,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:32,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:32,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:32,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:32,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 17:06:32,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-02-07 17:06:32,106 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 17:06:32,106 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 17:06:32,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:32,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-07 17:06:32,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:32,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:32,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-07 17:06:32,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699514501] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:32,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:32,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 20 [2025-02-07 17:06:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535939272] [2025-02-07 17:06:32,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:32,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:06:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:32,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:06:32,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:32,501 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:32,706 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2025-02-07 17:06:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 17:06:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-07 17:06:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:32,707 INFO L225 Difference]: With dead ends: 57 [2025-02-07 17:06:32,707 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 17:06:32,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:32,708 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:32,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 17:06:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2025-02-07 17:06:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2025-02-07 17:06:32,714 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 31 [2025-02-07 17:06:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:32,714 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2025-02-07 17:06:32,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2025-02-07 17:06:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:06:32,715 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:32,715 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:32,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:32,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:32,916 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:32,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1299201333, now seen corresponding path program 4 times [2025-02-07 17:06:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:32,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463807467] [2025-02-07 17:06:32,917 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:32,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:32,923 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-07 17:06:32,927 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 32 statements. [2025-02-07 17:06:32,927 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:32,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:32,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:32,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463807467] [2025-02-07 17:06:32,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463807467] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:32,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249361459] [2025-02-07 17:06:32,984 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:32,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:32,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:32,986 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:32,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 17:06:33,020 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-07 17:06:33,032 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 28 of 32 statements. [2025-02-07 17:06:33,032 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:33,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:33,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:33,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249361459] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:33,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:33,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-02-07 17:06:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176893645] [2025-02-07 17:06:33,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:33,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 17:06:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:33,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 17:06:33,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-02-07 17:06:33,136 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:33,284 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2025-02-07 17:06:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 17:06:33,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 32 [2025-02-07 17:06:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:33,285 INFO L225 Difference]: With dead ends: 104 [2025-02-07 17:06:33,285 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:06:33,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:06:33,286 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:33,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:06:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2025-02-07 17:06:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2025-02-07 17:06:33,295 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 32 [2025-02-07 17:06:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:33,295 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2025-02-07 17:06:33,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2025-02-07 17:06:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-07 17:06:33,296 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:33,296 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:33,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:33,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-07 17:06:33,497 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:33,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:33,498 INFO L85 PathProgramCache]: Analyzing trace with hash -473434859, now seen corresponding path program 5 times [2025-02-07 17:06:33,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:33,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695444900] [2025-02-07 17:06:33,498 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:33,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:33,508 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 3 equivalence classes. [2025-02-07 17:06:33,520 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:33,520 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:33,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:33,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:33,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695444900] [2025-02-07 17:06:33,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695444900] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:33,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110942859] [2025-02-07 17:06:33,572 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:33,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:33,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:33,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:33,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 17:06:33,607 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 3 equivalence classes. [2025-02-07 17:06:33,634 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-02-07 17:06:33,635 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-07 17:06:33,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:33,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:33,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:33,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:06:33,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110942859] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:33,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:33,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2025-02-07 17:06:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587382203] [2025-02-07 17:06:33,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:33,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 17:06:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:33,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 17:06:33,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:06:33,707 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:33,756 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2025-02-07 17:06:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 17:06:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 32 [2025-02-07 17:06:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:33,757 INFO L225 Difference]: With dead ends: 110 [2025-02-07 17:06:33,757 INFO L226 Difference]: Without dead ends: 58 [2025-02-07 17:06:33,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-07 17:06:33,758 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:33,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-07 17:06:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-02-07 17:06:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2025-02-07 17:06:33,768 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2025-02-07 17:06:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:33,768 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2025-02-07 17:06:33,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2025-02-07 17:06:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 17:06:33,770 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:33,771 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:33,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:33,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:33,971 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:33,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1169149262, now seen corresponding path program 6 times [2025-02-07 17:06:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:33,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795465049] [2025-02-07 17:06:33,972 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:33,979 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-07 17:06:33,989 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:06:33,991 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:33,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:06:34,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795465049] [2025-02-07 17:06:34,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795465049] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:34,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750688449] [2025-02-07 17:06:34,068 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:34,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:34,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:34,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:34,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 17:06:34,107 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 3 equivalence classes. [2025-02-07 17:06:34,125 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 17:06:34,125 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 17:06:34,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:34,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 17:06:34,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:06:34,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 17:06:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750688449] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:34,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:34,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-02-07 17:06:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761258388] [2025-02-07 17:06:34,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:34,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 17:06:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:34,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 17:06:34,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-02-07 17:06:34,215 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:34,295 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2025-02-07 17:06:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 33 [2025-02-07 17:06:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:34,296 INFO L225 Difference]: With dead ends: 62 [2025-02-07 17:06:34,296 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 17:06:34,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-02-07 17:06:34,296 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:34,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 17:06:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-02-07 17:06:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2025-02-07 17:06:34,302 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2025-02-07 17:06:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:34,302 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2025-02-07 17:06:34,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2025-02-07 17:06:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 17:06:34,303 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:34,303 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:34,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 17:06:34,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 17:06:34,504 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:34,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:34,505 INFO L85 PathProgramCache]: Analyzing trace with hash -397518283, now seen corresponding path program 7 times [2025-02-07 17:06:34,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:34,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345770397] [2025-02-07 17:06:34,505 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:34,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:34,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:06:34,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:06:34,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:34,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345770397] [2025-02-07 17:06:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345770397] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536031843] [2025-02-07 17:06:36,904 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:36,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:36,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 17:06:36,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 17:06:36,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 17:06:36,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:36,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:36,966 WARN L254 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 114 conjuncts are in the unsatisfiable core [2025-02-07 17:06:36,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:36,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:37,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 17:06:37,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536031843] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:37,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:37,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15, 11] total 44 [2025-02-07 17:06:37,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886706895] [2025-02-07 17:06:37,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:37,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-07 17:06:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:37,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-07 17:06:37,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 17:06:37,488 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:38,672 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2025-02-07 17:06:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-07 17:06:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 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 [2025-02-07 17:06:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:38,674 INFO L225 Difference]: With dead ends: 109 [2025-02-07 17:06:38,674 INFO L226 Difference]: Without dead ends: 106 [2025-02-07 17:06:38,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=3516, Unknown=0, NotChecked=0, Total=3906 [2025-02-07 17:06:38,675 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:38,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 17:06:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-02-07 17:06:38,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2025-02-07 17:06:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 89 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2025-02-07 17:06:38,689 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 40 [2025-02-07 17:06:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:38,689 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2025-02-07 17:06:38,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2025-02-07 17:06:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-07 17:06:38,690 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:38,690 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:38,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:38,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:38,891 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:38,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash 561866862, now seen corresponding path program 8 times [2025-02-07 17:06:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:38,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290063651] [2025-02-07 17:06:38,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:38,903 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-07 17:06:38,911 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:06:38,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:38,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-07 17:06:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290063651] [2025-02-07 17:06:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290063651] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484721646] [2025-02-07 17:06:38,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:38,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:38,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:38,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:38,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 17:06:39,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-02-07 17:06:39,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-02-07 17:06:39,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:39,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:39,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:39,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-07 17:06:39,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-07 17:06:39,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484721646] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:39,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:39,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:39,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292255728] [2025-02-07 17:06:39,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:39,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:39,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:39,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:39,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:39,188 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:39,316 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2025-02-07 17:06:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 17:06:39,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-02-07 17:06:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:39,317 INFO L225 Difference]: With dead ends: 190 [2025-02-07 17:06:39,317 INFO L226 Difference]: Without dead ends: 86 [2025-02-07 17:06:39,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:39,318 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:39,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-02-07 17:06:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2025-02-07 17:06:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2025-02-07 17:06:39,326 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 41 [2025-02-07 17:06:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:39,326 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2025-02-07 17:06:39,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2025-02-07 17:06:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-02-07 17:06:39,327 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:39,327 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:39,333 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 [2025-02-07 17:06:39,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:39,528 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:39,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:39,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1329774677, now seen corresponding path program 9 times [2025-02-07 17:06:39,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:39,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398257807] [2025-02-07 17:06:39,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:39,534 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 3 equivalence classes. [2025-02-07 17:06:39,544 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:06:39,544 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:39,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-07 17:06:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:39,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398257807] [2025-02-07 17:06:39,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398257807] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:39,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037361919] [2025-02-07 17:06:39,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:39,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:39,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 17:06:39,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 3 equivalence classes. [2025-02-07 17:06:39,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 42 of 42 statements. [2025-02-07 17:06:39,683 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 17:06:39,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:39,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 17:06:39,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-07 17:06:39,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-07 17:06:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037361919] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:39,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:39,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-02-07 17:06:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821381381] [2025-02-07 17:06:39,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:39,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 17:06:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:39,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 17:06:39,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-02-07 17:06:39,797 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:39,889 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2025-02-07 17:06:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:06:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2025-02-07 17:06:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:39,890 INFO L225 Difference]: With dead ends: 121 [2025-02-07 17:06:39,890 INFO L226 Difference]: Without dead ends: 50 [2025-02-07 17:06:39,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:39,891 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:39,892 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 14 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-07 17:06:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-02-07 17:06:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2025-02-07 17:06:39,899 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2025-02-07 17:06:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:39,899 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2025-02-07 17:06:39,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2025-02-07 17:06:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 17:06:39,900 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:39,900 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:39,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:40,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:40,101 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:40,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:40,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1767021678, now seen corresponding path program 10 times [2025-02-07 17:06:40,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:40,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835280733] [2025-02-07 17:06:40,101 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:40,108 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-02-07 17:06:40,131 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:06:40,131 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:40,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:43,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:43,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835280733] [2025-02-07 17:06:43,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835280733] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:43,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701570645] [2025-02-07 17:06:43,017 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:43,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:43,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:43,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:43,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 17:06:43,065 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-02-07 17:06:43,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 17:06:43,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:06:43,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:43,100 WARN L254 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 150 conjuncts are in the unsatisfiable core [2025-02-07 17:06:43,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:43,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:43,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 17:06:43,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701570645] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:43,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:43,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 18, 13] total 57 [2025-02-07 17:06:43,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080426141] [2025-02-07 17:06:43,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:43,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-07 17:06:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:43,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-07 17:06:43,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3011, Unknown=0, NotChecked=0, Total=3192 [2025-02-07 17:06:43,947 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 57 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:46,789 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2025-02-07 17:06:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 17:06:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 57 states have internal predecessors, (123), 0 states have call successors, (0), 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 49 [2025-02-07 17:06:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:46,791 INFO L225 Difference]: With dead ends: 131 [2025-02-07 17:06:46,791 INFO L226 Difference]: Without dead ends: 128 [2025-02-07 17:06:46,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=582, Invalid=7428, Unknown=0, NotChecked=0, Total=8010 [2025-02-07 17:06:46,793 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:46,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-07 17:06:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-07 17:06:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 52. [2025-02-07 17:06:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2025-02-07 17:06:46,813 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 49 [2025-02-07 17:06:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:46,813 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2025-02-07 17:06:46,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 57 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2025-02-07 17:06:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 17:06:46,815 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:46,815 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:47,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 17:06:47,015 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:47,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1056871083, now seen corresponding path program 11 times [2025-02-07 17:06:47,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:47,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134464516] [2025-02-07 17:06:47,016 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:47,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:47,026 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 4 equivalence classes. [2025-02-07 17:06:47,035 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:06:47,035 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:47,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 17:06:47,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134464516] [2025-02-07 17:06:47,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134464516] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455983060] [2025-02-07 17:06:47,175 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:47,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:47,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:47,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 17:06:47,222 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 4 equivalence classes. [2025-02-07 17:06:47,305 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 17:06:47,306 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:47,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:47,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:47,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 17:06:47,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 17:06:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455983060] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:47,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:47,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-02-07 17:06:47,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982681885] [2025-02-07 17:06:47,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:47,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 17:06:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:47,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 17:06:47,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-02-07 17:06:47,442 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:47,644 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2025-02-07 17:06:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 17:06:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-07 17:06:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:47,645 INFO L225 Difference]: With dead ends: 132 [2025-02-07 17:06:47,645 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 17:06:47,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:47,648 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:47,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 17:06:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2025-02-07 17:06:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2025-02-07 17:06:47,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 50 [2025-02-07 17:06:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:47,664 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2025-02-07 17:06:47,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2025-02-07 17:06:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 17:06:47,664 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:47,664 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:47,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 17:06:47,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 17:06:47,867 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:47,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 126526005, now seen corresponding path program 12 times [2025-02-07 17:06:47,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:47,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784862624] [2025-02-07 17:06:47,868 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:47,874 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 56 statements into 4 equivalence classes. [2025-02-07 17:06:47,886 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 17:06:47,887 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:47,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 17:06:48,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:48,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784862624] [2025-02-07 17:06:48,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784862624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:48,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470027028] [2025-02-07 17:06:48,016 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:48,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:48,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:48,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:48,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 17:06:48,055 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 56 statements into 4 equivalence classes. [2025-02-07 17:06:48,087 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 17:06:48,087 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:48,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:48,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:48,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 17:06:48,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 17:06:48,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470027028] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:48,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:48,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 17:06:48,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182403879] [2025-02-07 17:06:48,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:48,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:06:48,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:48,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:06:48,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:48,281 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2025-02-07 17:06:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:48,404 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2025-02-07 17:06:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 17:06:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 56 [2025-02-07 17:06:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:48,405 INFO L225 Difference]: With dead ends: 108 [2025-02-07 17:06:48,405 INFO L226 Difference]: Without dead ends: 58 [2025-02-07 17:06:48,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:48,406 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:48,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-07 17:06:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-02-07 17:06:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2025-02-07 17:06:48,420 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 56 [2025-02-07 17:06:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:48,420 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2025-02-07 17:06:48,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2025-02-07 17:06:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2025-02-07 17:06:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-07 17:06:48,421 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:48,421 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:48,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:48,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:48,622 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:48,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash 338403182, now seen corresponding path program 13 times [2025-02-07 17:06:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:48,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090447431] [2025-02-07 17:06:48,623 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:48,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:48,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-07 17:06:48,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 17:06:48,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:48,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:48,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090447431] [2025-02-07 17:06:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090447431] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:48,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520482401] [2025-02-07 17:06:48,751 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:06:48,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:48,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:48,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:48,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 17:06:48,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-07 17:06:48,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 17:06:48,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:06:48,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:48,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 17:06:48,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:48,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:49,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520482401] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:49,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:49,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-02-07 17:06:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120679960] [2025-02-07 17:06:49,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:49,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 17:06:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:49,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 17:06:49,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2025-02-07 17:06:49,023 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2025-02-07 17:06:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:49,145 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2025-02-07 17:06:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 57 [2025-02-07 17:06:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:49,146 INFO L225 Difference]: With dead ends: 62 [2025-02-07 17:06:49,146 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 17:06:49,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:49,146 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:49,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:06:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 17:06:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-02-07 17:06:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2025-02-07 17:06:49,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 57 [2025-02-07 17:06:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:49,178 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2025-02-07 17:06:49,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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) [2025-02-07 17:06:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2025-02-07 17:06:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-02-07 17:06:49,178 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:49,178 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:49,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:49,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:49,379 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:49,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1900595797, now seen corresponding path program 14 times [2025-02-07 17:06:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:49,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417612411] [2025-02-07 17:06:49,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:49,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:49,390 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-02-07 17:06:49,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-02-07 17:06:49,418 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:49,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:53,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417612411] [2025-02-07 17:06:53,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417612411] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143748118] [2025-02-07 17:06:53,033 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:06:53,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:53,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:53,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:53,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 17:06:53,084 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-02-07 17:06:53,115 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-02-07 17:06:53,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:06:53,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:53,119 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 179 conjuncts are in the unsatisfiable core [2025-02-07 17:06:53,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:53,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:06:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:06:53,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-07 17:06:53,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143748118] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:53,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:53,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 21, 15] total 64 [2025-02-07 17:06:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998609252] [2025-02-07 17:06:53,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:53,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-02-07 17:06:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:53,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-02-07 17:06:53,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3751, Unknown=0, NotChecked=0, Total=4032 [2025-02-07 17:06:53,988 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 64 states, 64 states have (on average 2.34375) internal successors, (150), 64 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:56,969 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2025-02-07 17:06:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-02-07 17:06:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 64 states have internal predecessors, (150), 0 states have call successors, (0), 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 58 [2025-02-07 17:06:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:56,970 INFO L225 Difference]: With dead ends: 183 [2025-02-07 17:06:56,970 INFO L226 Difference]: Without dead ends: 180 [2025-02-07 17:06:56,972 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1057, Invalid=8645, Unknown=0, NotChecked=0, Total=9702 [2025-02-07 17:06:56,972 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 3198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:56,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 3198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-02-07 17:06:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2025-02-07 17:06:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2025-02-07 17:06:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.2384105960264902) internal successors, (187), 151 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2025-02-07 17:06:57,038 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 58 [2025-02-07 17:06:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:57,038 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2025-02-07 17:06:57,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 64 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2025-02-07 17:06:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-07 17:06:57,039 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:57,039 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:57,045 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 [2025-02-07 17:06:57,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 17:06:57,239 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:57,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:57,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1211040690, now seen corresponding path program 15 times [2025-02-07 17:06:57,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:57,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019574277] [2025-02-07 17:06:57,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:57,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:57,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 4 equivalence classes. [2025-02-07 17:06:57,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 17:06:57,261 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:06:57,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:57,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019574277] [2025-02-07 17:06:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019574277] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007468812] [2025-02-07 17:06:57,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:06:57,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:57,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:57,383 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:57,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 17:06:57,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 4 equivalence classes. [2025-02-07 17:06:57,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 17:06:57,464 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 17:06:57,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:57,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:57,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:57,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-02-07 17:06:57,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007468812] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:57,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-02-07 17:06:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9589538] [2025-02-07 17:06:57,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:57,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 17:06:57,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:57,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 17:06:57,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-02-07 17:06:57,680 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:57,973 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2025-02-07 17:06:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 17:06:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 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 59 [2025-02-07 17:06:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:57,974 INFO L225 Difference]: With dead ends: 262 [2025-02-07 17:06:57,974 INFO L226 Difference]: Without dead ends: 122 [2025-02-07 17:06:57,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:06:57,976 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:57,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-07 17:06:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2025-02-07 17:06:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 117 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2025-02-07 17:06:58,007 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 59 [2025-02-07 17:06:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:58,007 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2025-02-07 17:06:58,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2025-02-07 17:06:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-07 17:06:58,008 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:58,008 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:58,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:58,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 17:06:58,208 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:58,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -74721963, now seen corresponding path program 16 times [2025-02-07 17:06:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75825026] [2025-02-07 17:06:58,209 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:58,219 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 60 statements into 2 equivalence classes. [2025-02-07 17:06:58,223 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 53 of 60 statements. [2025-02-07 17:06:58,223 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:58,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-02-07 17:06:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75825026] [2025-02-07 17:06:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75825026] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071877720] [2025-02-07 17:06:58,325 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:06:58,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:58,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:58,327 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:58,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 17:06:58,372 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 60 statements into 2 equivalence classes. [2025-02-07 17:06:58,393 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 53 of 60 statements. [2025-02-07 17:06:58,393 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:06:58,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:58,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:58,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-02-07 17:06:58,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-02-07 17:06:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071877720] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:58,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-02-07 17:06:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32801234] [2025-02-07 17:06:58,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:58,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:06:58,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:58,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:06:58,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:58,536 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:58,762 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2025-02-07 17:06:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:06:58,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-02-07 17:06:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:58,763 INFO L225 Difference]: With dead ends: 122 [2025-02-07 17:06:58,763 INFO L226 Difference]: Without dead ends: 83 [2025-02-07 17:06:58,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 101 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-02-07 17:06:58,764 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:58,764 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:06:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-07 17:06:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2025-02-07 17:06:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2025-02-07 17:06:58,782 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 60 [2025-02-07 17:06:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:58,782 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2025-02-07 17:06:58,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2025-02-07 17:06:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-02-07 17:06:58,783 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:58,783 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:58,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:58,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 17:06:58,984 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:58,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 986654293, now seen corresponding path program 17 times [2025-02-07 17:06:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:58,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194110880] [2025-02-07 17:06:58,984 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:58,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:58,990 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 66 statements into 4 equivalence classes. [2025-02-07 17:06:59,002 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 66 of 66 statements. [2025-02-07 17:06:59,002 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:59,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:06:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:06:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194110880] [2025-02-07 17:06:59,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194110880] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:06:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680978925] [2025-02-07 17:06:59,113 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:06:59,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:06:59,115 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:06:59,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 17:06:59,161 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 66 statements into 4 equivalence classes. [2025-02-07 17:06:59,286 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 66 of 66 statements. [2025-02-07 17:06:59,286 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-07 17:06:59,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:06:59,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 17:06:59,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:06:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:06:59,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:06:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:06:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680978925] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:06:59,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:06:59,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2025-02-07 17:06:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884163484] [2025-02-07 17:06:59,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:06:59,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 17:06:59,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:06:59,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 17:06:59,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:59,460 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:06:59,528 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2025-02-07 17:06:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 17:06:59,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2025-02-07 17:06:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:06:59,529 INFO L225 Difference]: With dead ends: 127 [2025-02-07 17:06:59,529 INFO L226 Difference]: Without dead ends: 68 [2025-02-07 17:06:59,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2025-02-07 17:06:59,530 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 17:06:59,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 17:06:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-07 17:06:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-07 17:06:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2025-02-07 17:06:59,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 66 [2025-02-07 17:06:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:06:59,548 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2025-02-07 17:06:59,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:06:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2025-02-07 17:06:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-07 17:06:59,549 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:06:59,549 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:06:59,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-07 17:06:59,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:06:59,750 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:06:59,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:06:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash 721662030, now seen corresponding path program 18 times [2025-02-07 17:06:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:06:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555448096] [2025-02-07 17:06:59,750 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:06:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:06:59,756 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 67 statements into 4 equivalence classes. [2025-02-07 17:06:59,818 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 17:06:59,818 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:06:59,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:04,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:04,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555448096] [2025-02-07 17:07:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555448096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:04,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724664227] [2025-02-07 17:07:04,648 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:04,650 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:04,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:07:04,701 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 67 statements into 4 equivalence classes. [2025-02-07 17:07:04,747 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 17:07:04,748 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-02-07 17:07:04,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:04,753 WARN L254 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 227 conjuncts are in the unsatisfiable core [2025-02-07 17:07:04,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:04,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:05,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:07:05,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-02-07 17:07:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:06,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:08,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2025-02-07 17:07:08,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:07:08,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 369 treesize of output 225 [2025-02-07 17:07:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:08,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724664227] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:08,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:08,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 30, 44] total 107 [2025-02-07 17:07:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175184142] [2025-02-07 17:07:08,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:08,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2025-02-07 17:07:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:08,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2025-02-07 17:07:08,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=10668, Unknown=0, NotChecked=0, Total=11342 [2025-02-07 17:07:08,725 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:12,049 INFO L93 Difference]: Finished difference Result 152 states and 192 transitions. [2025-02-07 17:07:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-07 17:07:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 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 67 [2025-02-07 17:07:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:12,050 INFO L225 Difference]: With dead ends: 152 [2025-02-07 17:07:12,050 INFO L226 Difference]: Without dead ends: 149 [2025-02-07 17:07:12,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=890, Invalid=12450, Unknown=0, NotChecked=0, Total=13340 [2025-02-07 17:07:12,053 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 4747 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 5169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 4747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:12,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 5169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 4747 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-02-07 17:07:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2025-02-07 17:07:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2025-02-07 17:07:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.267605633802817) internal successors, (180), 142 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2025-02-07 17:07:12,103 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 67 [2025-02-07 17:07:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:12,103 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2025-02-07 17:07:12,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2025-02-07 17:07:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-07 17:07:12,104 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:12,104 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:12,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 17:07:12,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:12,308 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:12,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1096836469, now seen corresponding path program 19 times [2025-02-07 17:07:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948735909] [2025-02-07 17:07:12,308 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:12,318 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-02-07 17:07:12,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 17:07:12,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:12,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:07:12,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:12,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948735909] [2025-02-07 17:07:12,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948735909] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:12,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749927967] [2025-02-07 17:07:12,564 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:12,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:12,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:12,571 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:12,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:07:12,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-02-07 17:07:12,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 17:07:12,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:12,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:12,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:07:12,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:07:12,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:07:12,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749927967] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:12,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:12,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2025-02-07 17:07:12,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488131794] [2025-02-07 17:07:12,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:12,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:07:12,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:12,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:07:12,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:07:12,894 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:13,135 INFO L93 Difference]: Finished difference Result 256 states and 314 transitions. [2025-02-07 17:07:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:07:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 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 68 [2025-02-07 17:07:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:13,138 INFO L225 Difference]: With dead ends: 256 [2025-02-07 17:07:13,139 INFO L226 Difference]: Without dead ends: 204 [2025-02-07 17:07:13,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 113 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:07:13,140 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:13,140 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 112 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2025-02-07 17:07:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2025-02-07 17:07:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.234375) internal successors, (237), 192 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 237 transitions. [2025-02-07 17:07:13,208 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 237 transitions. Word has length 68 [2025-02-07 17:07:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:13,208 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 237 transitions. [2025-02-07 17:07:13,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 237 transitions. [2025-02-07 17:07:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-07 17:07:13,209 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:13,209 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:13,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 17:07:13,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:13,410 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:13,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:13,410 INFO L85 PathProgramCache]: Analyzing trace with hash -533249522, now seen corresponding path program 20 times [2025-02-07 17:07:13,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:13,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797341061] [2025-02-07 17:07:13,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:13,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:13,416 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-02-07 17:07:13,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:07:13,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:13,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2025-02-07 17:07:13,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:13,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797341061] [2025-02-07 17:07:13,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797341061] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:13,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741971584] [2025-02-07 17:07:13,651 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:13,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:13,654 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:13,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:07:13,788 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-02-07 17:07:13,822 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:07:13,823 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:13,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:13,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 17:07:13,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-02-07 17:07:14,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2025-02-07 17:07:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741971584] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:14,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:14,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 29 [2025-02-07 17:07:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308004940] [2025-02-07 17:07:14,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:14,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:07:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:14,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:07:14,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:14,201 INFO L87 Difference]: Start difference. First operand 193 states and 237 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:14,416 INFO L93 Difference]: Finished difference Result 253 states and 303 transitions. [2025-02-07 17:07:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 17:07:14,417 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2025-02-07 17:07:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:14,418 INFO L225 Difference]: With dead ends: 253 [2025-02-07 17:07:14,419 INFO L226 Difference]: Without dead ends: 77 [2025-02-07 17:07:14,420 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:14,423 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:14,423 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-02-07 17:07:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2025-02-07 17:07:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2025-02-07 17:07:14,460 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 71 [2025-02-07 17:07:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:14,461 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2025-02-07 17:07:14,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2025-02-07 17:07:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-07 17:07:14,461 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:14,461 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:14,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 17:07:14,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:14,662 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:14,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1926984309, now seen corresponding path program 21 times [2025-02-07 17:07:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:14,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011451742] [2025-02-07 17:07:14,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:14,672 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 5 equivalence classes. [2025-02-07 17:07:14,802 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 76 of 76 statements. [2025-02-07 17:07:14,803 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:07:14,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 1 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011451742] [2025-02-07 17:07:20,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011451742] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699374471] [2025-02-07 17:07:20,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:20,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:20,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:20,647 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:20,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:07:20,706 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 5 equivalence classes. [2025-02-07 17:07:20,783 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 76 of 76 statements. [2025-02-07 17:07:20,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 17:07:20,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:20,792 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 261 conjuncts are in the unsatisfiable core [2025-02-07 17:07:20,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:20,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:22,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-07 17:07:22,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:07:22,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2025-02-07 17:07:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:22,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 17:07:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699374471] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:23,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 21] total 75 [2025-02-07 17:07:23,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007169489] [2025-02-07 17:07:23,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:23,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-02-07 17:07:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:23,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-02-07 17:07:23,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=5109, Unknown=0, NotChecked=0, Total=5550 [2025-02-07 17:07:23,881 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 75 states, 75 states have (on average 2.84) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:26,371 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2025-02-07 17:07:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 17:07:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.84) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 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 76 [2025-02-07 17:07:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:26,373 INFO L225 Difference]: With dead ends: 202 [2025-02-07 17:07:26,373 INFO L226 Difference]: Without dead ends: 199 [2025-02-07 17:07:26,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2464 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=710, Invalid=8602, Unknown=0, NotChecked=0, Total=9312 [2025-02-07 17:07:26,374 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 3519 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:26,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3519 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-02-07 17:07:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2025-02-07 17:07:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 127. [2025-02-07 17:07:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.126984126984127) internal successors, (142), 126 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2025-02-07 17:07:26,441 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 76 [2025-02-07 17:07:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:26,441 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2025-02-07 17:07:26,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.84) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2025-02-07 17:07:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-07 17:07:26,442 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:26,442 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:26,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 17:07:26,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-07 17:07:26,646 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:26,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash -392996818, now seen corresponding path program 22 times [2025-02-07 17:07:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:26,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579832478] [2025-02-07 17:07:26,647 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:26,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:26,657 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 77 statements into 2 equivalence classes. [2025-02-07 17:07:26,663 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 68 of 77 statements. [2025-02-07 17:07:26,663 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:26,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579832478] [2025-02-07 17:07:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579832478] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723541951] [2025-02-07 17:07:26,794 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:26,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:26,796 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:26,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:07:26,852 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 77 statements into 2 equivalence classes. [2025-02-07 17:07:26,881 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 68 of 77 statements. [2025-02-07 17:07:26,881 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:07:26,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:26,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:07:26,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:27,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:27,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723541951] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:27,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:27,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-02-07 17:07:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604236092] [2025-02-07 17:07:27,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:27,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:07:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:27,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:07:27,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:07:27,158 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:27,533 INFO L93 Difference]: Finished difference Result 244 states and 277 transitions. [2025-02-07 17:07:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:07:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 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 77 [2025-02-07 17:07:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:27,534 INFO L225 Difference]: With dead ends: 244 [2025-02-07 17:07:27,534 INFO L226 Difference]: Without dead ends: 136 [2025-02-07 17:07:27,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 17:07:27,538 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:27,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-02-07 17:07:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2025-02-07 17:07:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 131 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2025-02-07 17:07:27,594 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 77 [2025-02-07 17:07:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:27,594 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2025-02-07 17:07:27,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2025-02-07 17:07:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-07 17:07:27,595 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:27,595 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:27,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:27,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 17:07:27,800 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:27,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1878728974, now seen corresponding path program 23 times [2025-02-07 17:07:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:27,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975446052] [2025-02-07 17:07:27,801 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:27,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:27,809 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 5 equivalence classes. [2025-02-07 17:07:27,827 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 77 of 77 statements. [2025-02-07 17:07:27,827 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:07:27,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:28,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975446052] [2025-02-07 17:07:28,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975446052] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:28,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948918492] [2025-02-07 17:07:28,104 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:07:28,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:28,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:28,106 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:28,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:07:28,172 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 5 equivalence classes. [2025-02-07 17:07:28,466 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 77 of 77 statements. [2025-02-07 17:07:28,466 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 17:07:28,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:28,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:07:28,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:28,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-02-07 17:07:28,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948918492] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:28,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:28,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2025-02-07 17:07:28,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026298898] [2025-02-07 17:07:28,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:28,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 17:07:28,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:28,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 17:07:28,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2025-02-07 17:07:28,733 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:29,040 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2025-02-07 17:07:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:07:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 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 77 [2025-02-07 17:07:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:29,042 INFO L225 Difference]: With dead ends: 136 [2025-02-07 17:07:29,042 INFO L226 Difference]: Without dead ends: 85 [2025-02-07 17:07:29,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 129 SyntacticMatches, 17 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 17:07:29,042 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:29,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-07 17:07:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2025-02-07 17:07:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2025-02-07 17:07:29,075 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 77 [2025-02-07 17:07:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:29,075 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2025-02-07 17:07:29,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2025-02-07 17:07:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-02-07 17:07:29,081 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:29,081 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:29,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-07 17:07:29,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-02-07 17:07:29,281 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:29,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1376661109, now seen corresponding path program 24 times [2025-02-07 17:07:29,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:29,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132335534] [2025-02-07 17:07:29,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:29,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:29,290 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 84 statements into 5 equivalence classes. [2025-02-07 17:07:29,320 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 84 of 84 statements. [2025-02-07 17:07:29,321 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:07:29,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-02-07 17:07:29,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:29,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132335534] [2025-02-07 17:07:29,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132335534] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:29,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595486050] [2025-02-07 17:07:29,499 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:07:29,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:29,501 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:29,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:07:29,566 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 84 statements into 5 equivalence classes. [2025-02-07 17:07:29,621 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 84 of 84 statements. [2025-02-07 17:07:29,621 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-07 17:07:29,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:29,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:07:29,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-02-07 17:07:29,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-02-07 17:07:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595486050] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:29,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:29,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-02-07 17:07:29,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926101179] [2025-02-07 17:07:29,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:29,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 17:07:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:29,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 17:07:29,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:29,940 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:30,066 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2025-02-07 17:07:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 17:07:30,066 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2025-02-07 17:07:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:30,067 INFO L225 Difference]: With dead ends: 161 [2025-02-07 17:07:30,067 INFO L226 Difference]: Without dead ends: 86 [2025-02-07 17:07:30,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2025-02-07 17:07:30,067 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:30,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:07:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-02-07 17:07:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2025-02-07 17:07:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2025-02-07 17:07:30,099 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 84 [2025-02-07 17:07:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:30,099 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2025-02-07 17:07:30,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2025-02-07 17:07:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-07 17:07:30,100 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:30,100 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:30,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:30,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:07:30,304 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:30,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1447791662, now seen corresponding path program 25 times [2025-02-07 17:07:30,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:30,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253868417] [2025-02-07 17:07:30,305 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:30,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-07 17:07:30,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-07 17:07:30,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:30,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 25 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:38,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:38,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253868417] [2025-02-07 17:07:38,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253868417] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:38,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708941154] [2025-02-07 17:07:38,508 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:07:38,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:38,511 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:38,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-07 17:07:38,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-02-07 17:07:38,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-02-07 17:07:38,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:07:38,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:38,633 WARN L254 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 284 conjuncts are in the unsatisfiable core [2025-02-07 17:07:38,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:38,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 17:07:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:07:39,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 17:07:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708941154] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:40,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 30, 21] total 88 [2025-02-07 17:07:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758602851] [2025-02-07 17:07:40,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:40,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2025-02-07 17:07:40,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:40,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2025-02-07 17:07:40,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=7167, Unknown=0, NotChecked=0, Total=7656 [2025-02-07 17:07:40,140 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 88 states, 88 states have (on average 2.3636363636363638) internal successors, (208), 88 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:44,346 INFO L93 Difference]: Finished difference Result 227 states and 258 transitions. [2025-02-07 17:07:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-02-07 17:07:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.3636363636363638) internal successors, (208), 88 states have internal predecessors, (208), 0 states have call successors, (0), 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 85 [2025-02-07 17:07:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:44,347 INFO L225 Difference]: With dead ends: 227 [2025-02-07 17:07:44,347 INFO L226 Difference]: Without dead ends: 224 [2025-02-07 17:07:44,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4675 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1302, Invalid=15468, Unknown=0, NotChecked=0, Total=16770 [2025-02-07 17:07:44,349 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 4455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:44,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 91 Invalid, 4455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-02-07 17:07:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-02-07 17:07:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2025-02-07 17:07:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.119205298013245) internal successors, (169), 151 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2025-02-07 17:07:44,429 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 85 [2025-02-07 17:07:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:44,429 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2025-02-07 17:07:44,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.3636363636363638) internal successors, (208), 88 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2025-02-07 17:07:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-07 17:07:44,432 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:44,432 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:44,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-02-07 17:07:44,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:07:44,636 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:44,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900309, now seen corresponding path program 26 times [2025-02-07 17:07:44,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:44,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266609346] [2025-02-07 17:07:44,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:44,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:44,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-07 17:07:44,657 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-07 17:07:44,657 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:44,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-02-07 17:07:44,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:44,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266609346] [2025-02-07 17:07:44,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266609346] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:44,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804367637] [2025-02-07 17:07:44,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:07:44,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:44,877 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:44,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-07 17:07:44,942 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-07 17:07:44,990 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-07 17:07:44,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:07:44,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:44,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:07:44,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-02-07 17:07:45,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-02-07 17:07:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804367637] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:45,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:45,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:07:45,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433208176] [2025-02-07 17:07:45,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:45,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:07:45,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:45,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:07:45,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:07:45,331 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:45,662 INFO L93 Difference]: Finished difference Result 320 states and 355 transitions. [2025-02-07 17:07:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 17:07:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 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 86 [2025-02-07 17:07:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:45,663 INFO L225 Difference]: With dead ends: 320 [2025-02-07 17:07:45,663 INFO L226 Difference]: Without dead ends: 143 [2025-02-07 17:07:45,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:07:45,664 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:45,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-02-07 17:07:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2025-02-07 17:07:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2025-02-07 17:07:45,724 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 86 [2025-02-07 17:07:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:45,724 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2025-02-07 17:07:45,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2025-02-07 17:07:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-02-07 17:07:45,724 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:45,725 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:45,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-02-07 17:07:45,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 17:07:45,925 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:45,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1568885006, now seen corresponding path program 27 times [2025-02-07 17:07:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:45,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124946961] [2025-02-07 17:07:45,925 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:45,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 6 equivalence classes. [2025-02-07 17:07:45,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 87 of 87 statements. [2025-02-07 17:07:45,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:07:45,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-02-07 17:07:46,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:07:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124946961] [2025-02-07 17:07:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124946961] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:07:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350800619] [2025-02-07 17:07:46,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:07:46,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:07:46,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:07:46,181 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:07:46,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-07 17:07:46,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 6 equivalence classes. [2025-02-07 17:07:46,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 87 of 87 statements. [2025-02-07 17:07:46,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 17:07:46,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:07:46,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-07 17:07:46,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:07:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-02-07 17:07:46,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:07:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-02-07 17:07:46,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350800619] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:07:46,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:07:46,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-02-07 17:07:46,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043778199] [2025-02-07 17:07:46,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:07:46,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:07:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:07:46,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:07:46,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:07:46,595 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:07:46,804 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2025-02-07 17:07:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-07 17:07:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 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 87 [2025-02-07 17:07:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:07:46,805 INFO L225 Difference]: With dead ends: 207 [2025-02-07 17:07:46,805 INFO L226 Difference]: Without dead ends: 95 [2025-02-07 17:07:46,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:07:46,805 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:07:46,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:07:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-02-07 17:07:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2025-02-07 17:07:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 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) [2025-02-07 17:07:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2025-02-07 17:07:46,844 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 87 [2025-02-07 17:07:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:07:46,844 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2025-02-07 17:07:46,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:07:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2025-02-07 17:07:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-02-07 17:07:46,844 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:07:46,844 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:07:46,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-02-07 17:07:47,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-07 17:07:47,045 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:07:47,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:07:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1130910357, now seen corresponding path program 28 times [2025-02-07 17:07:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:07:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432163453] [2025-02-07 17:07:47,046 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:07:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:07:47,054 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 94 statements into 2 equivalence classes. [2025-02-07 17:07:47,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-02-07 17:07:47,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 17:07:47,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat