./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnifrev2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rewnifrev2.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 a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 10:09:09,333 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 10:09:09,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 10:09:09,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 10:09:09,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 10:09:09,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 10:09:09,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 10:09:09,411 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 10:09:09,412 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 10:09:09,412 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 10:09:09,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 10:09:09,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 10:09:09,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 10:09:09,412 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 10:09:09,412 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 10:09:09,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 10:09:09,413 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 10:09:09,413 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 10:09:09,414 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 10:09:09,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:09:09,416 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 10:09:09,416 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 10:09:09,417 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 10:09:09,417 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 10:09:09,417 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 -> a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 [2025-02-05 10:09:09,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 10:09:09,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 10:09:09,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 10:09:09,714 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 10:09:09,715 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 10:09:09,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev2.c [2025-02-05 10:09:10,916 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/afae7aad6/1be3f8d572724893b3fdbca7e8cb8620/FLAG4b27415f3 [2025-02-05 10:09:11,139 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 10:09:11,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c [2025-02-05 10:09:11,145 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/afae7aad6/1be3f8d572724893b3fdbca7e8cb8620/FLAG4b27415f3 [2025-02-05 10:09:11,179 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/afae7aad6/1be3f8d572724893b3fdbca7e8cb8620 [2025-02-05 10:09:11,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 10:09:11,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 10:09:11,189 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 10:09:11,189 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 10:09:11,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 10:09:11,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a544c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11, skipping insertion in model container [2025-02-05 10:09:11,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,206 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 10:09:11,299 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-tiling/rewnifrev2.c[401,414] [2025-02-05 10:09:11,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:09:11,313 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 10:09:11,319 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-tiling/rewnifrev2.c[401,414] [2025-02-05 10:09:11,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 10:09:11,337 INFO L204 MainTranslator]: Completed translation [2025-02-05 10:09:11,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11 WrapperNode [2025-02-05 10:09:11,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 10:09:11,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 10:09:11,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 10:09:11,343 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 10:09:11,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,371 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2025-02-05 10:09:11,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 10:09:11,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 10:09:11,372 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 10:09:11,372 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 10:09:11,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,379 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,386 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-05 10:09:11,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,388 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 10:09:11,391 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 10:09:11,391 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 10:09:11,391 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 10:09:11,392 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (1/1) ... [2025-02-05 10:09:11,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 10:09:11,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:11,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 10:09:11,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 10:09:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 10:09:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 10:09:11,482 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 10:09:11,484 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 10:09:11,555 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-05 10:09:11,555 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 10:09:11,561 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 10:09:11,561 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 10:09:11,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:09:11 BoogieIcfgContainer [2025-02-05 10:09:11,561 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 10:09:11,563 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 10:09:11,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 10:09:11,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 10:09:11,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:09:11" (1/3) ... [2025-02-05 10:09:11,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d401b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:09:11, skipping insertion in model container [2025-02-05 10:09:11,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:09:11" (2/3) ... [2025-02-05 10:09:11,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d401b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:09:11, skipping insertion in model container [2025-02-05 10:09:11,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 10:09:11" (3/3) ... [2025-02-05 10:09:11,568 INFO L128 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2025-02-05 10:09:11,577 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 10:09:11,579 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG rewnifrev2.c that has 1 procedures, 13 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 10:09:11,611 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 10:09:11,618 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;@9cf5c0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 10:09:11,618 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 10:09:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 10:09:11,623 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:11,623 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:11,623 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:11,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1712306486, now seen corresponding path program 1 times [2025-02-05 10:09:11,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:11,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363965990] [2025-02-05 10:09:11,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:09:11,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:11,692 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 10:09:11,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 10:09:11,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:11,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:11,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:11,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363965990] [2025-02-05 10:09:11,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363965990] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:09:11,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:09:11,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 10:09:11,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517803529] [2025-02-05 10:09:11,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:09:11,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 10:09:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:11,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 10:09:11,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:09:11,809 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:11,829 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2025-02-05 10:09:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 10:09:11,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-02-05 10:09:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:11,835 INFO L225 Difference]: With dead ends: 23 [2025-02-05 10:09:11,836 INFO L226 Difference]: Without dead ends: 10 [2025-02-05 10:09:11,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 10:09:11,839 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:11,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:09:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-05 10:09:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-05 10:09:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2025-02-05 10:09:11,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2025-02-05 10:09:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:11,862 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2025-02-05 10:09:11,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2025-02-05 10:09:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-05 10:09:11,864 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:11,864 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:11,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 10:09:11,864 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:11,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1540938243, now seen corresponding path program 1 times [2025-02-05 10:09:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509607097] [2025-02-05 10:09:11,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:09:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:11,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-05 10:09:11,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-05 10:09:11,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:11,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:12,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509607097] [2025-02-05 10:09:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509607097] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 10:09:12,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 10:09:12,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 10:09:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130853025] [2025-02-05 10:09:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 10:09:12,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 10:09:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:12,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 10:09:12,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-05 10:09:12,285 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:12,343 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2025-02-05 10:09:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 10:09:12,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-05 10:09:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:12,343 INFO L225 Difference]: With dead ends: 15 [2025-02-05 10:09:12,343 INFO L226 Difference]: Without dead ends: 13 [2025-02-05 10:09:12,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-02-05 10:09:12,344 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:12,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:09:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-05 10:09:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2025-02-05 10:09:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2025-02-05 10:09:12,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2025-02-05 10:09:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:12,349 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2025-02-05 10:09:12,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2025-02-05 10:09:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 10:09:12,350 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:12,350 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:12,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 10:09:12,351 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:12,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1479864754, now seen corresponding path program 1 times [2025-02-05 10:09:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697145248] [2025-02-05 10:09:12,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:09:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:12,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 10:09:12,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 10:09:12,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:12,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697145248] [2025-02-05 10:09:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697145248] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817122376] [2025-02-05 10:09:12,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 10:09:12,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:12,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:12,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 10:09:12,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 10:09:12,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 10:09:12,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:12,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:12,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:09:12,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:12,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2025-02-05 10:09:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:12,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:12,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817122376] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:12,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2025-02-05 10:09:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490658993] [2025-02-05 10:09:12,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:12,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-05 10:09:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:12,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-05 10:09:12,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-02-05 10:09:12,962 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:13,159 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2025-02-05 10:09:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 10:09:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-05 10:09:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:13,163 INFO L225 Difference]: With dead ends: 18 [2025-02-05 10:09:13,163 INFO L226 Difference]: Without dead ends: 16 [2025-02-05 10:09:13,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2025-02-05 10:09:13,164 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:13,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-05 10:09:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2025-02-05 10:09:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2025-02-05 10:09:13,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2025-02-05 10:09:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:13,172 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2025-02-05 10:09:13,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2025-02-05 10:09:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-05 10:09:13,172 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:13,172 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:13,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 10:09:13,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:13,377 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:13,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1189279837, now seen corresponding path program 2 times [2025-02-05 10:09:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:13,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112122934] [2025-02-05 10:09:13,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:09:13,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:13,390 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 10:09:13,396 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 10:09:13,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:09:13,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:13,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112122934] [2025-02-05 10:09:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112122934] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981141701] [2025-02-05 10:09:13,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:09:13,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:13,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:13,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:13,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 10:09:13,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-05 10:09:13,514 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-05 10:09:13,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:09:13,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:13,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 10:09:13,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:13,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981141701] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:13,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-02-05 10:09:13,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726031932] [2025-02-05 10:09:13,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:13,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 10:09:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:13,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 10:09:13,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:09:13,635 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:13,682 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2025-02-05 10:09:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 10:09:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-05 10:09:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:13,686 INFO L225 Difference]: With dead ends: 28 [2025-02-05 10:09:13,686 INFO L226 Difference]: Without dead ends: 16 [2025-02-05 10:09:13,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2025-02-05 10:09:13,687 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:13,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:09:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-05 10:09:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-02-05 10:09:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2025-02-05 10:09:13,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2025-02-05 10:09:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:13,691 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2025-02-05 10:09:13,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2025-02-05 10:09:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-05 10:09:13,691 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:13,691 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:13,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 10:09:13,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:13,892 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:13,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1272916426, now seen corresponding path program 3 times [2025-02-05 10:09:13,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:13,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909649755] [2025-02-05 10:09:13,893 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:09:13,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:13,899 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-02-05 10:09:13,921 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 10:09:13,923 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 10:09:13,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:14,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909649755] [2025-02-05 10:09:14,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909649755] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:14,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706980594] [2025-02-05 10:09:14,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:09:14,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:14,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:14,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 10:09:14,474 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 3 equivalence classes. [2025-02-05 10:09:14,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-02-05 10:09:14,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 10:09:14,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:14,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-05 10:09:14,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:14,495 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 28 treesize of output 29 [2025-02-05 10:09:14,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:14,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 48 [2025-02-05 10:09:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:14,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:14,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706980594] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:14,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2025-02-05 10:09:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196098292] [2025-02-05 10:09:14,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:14,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 10:09:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:14,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 10:09:14,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2025-02-05 10:09:14,825 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:15,569 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2025-02-05 10:09:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 10:09:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-05 10:09:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:15,569 INFO L225 Difference]: With dead ends: 40 [2025-02-05 10:09:15,570 INFO L226 Difference]: Without dead ends: 26 [2025-02-05 10:09:15,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2025-02-05 10:09:15,571 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:15,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-05 10:09:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2025-02-05 10:09:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-02-05 10:09:15,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2025-02-05 10:09:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:15,578 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-02-05 10:09:15,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-02-05 10:09:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 10:09:15,578 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:15,578 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:15,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 10:09:15,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:15,779 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:15,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash 642321998, now seen corresponding path program 4 times [2025-02-05 10:09:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:15,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015103222] [2025-02-05 10:09:15,780 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:09:15,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:15,787 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-02-05 10:09:15,794 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 16 of 19 statements. [2025-02-05 10:09:15,794 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:09:15,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:16,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:16,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015103222] [2025-02-05 10:09:16,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015103222] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:16,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372584550] [2025-02-05 10:09:16,012 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:09:16,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:16,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:16,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:16,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 10:09:16,060 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-02-05 10:09:16,070 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 16 of 19 statements. [2025-02-05 10:09:16,070 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:09:16,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:16,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-05 10:09:16,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:16,077 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 28 treesize of output 29 [2025-02-05 10:09:16,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:16,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 51 [2025-02-05 10:09:16,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:16,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 65 [2025-02-05 10:09:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:16,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372584550] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:16,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:16,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2025-02-05 10:09:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432339482] [2025-02-05 10:09:16,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:16,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 10:09:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:16,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 10:09:16,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2025-02-05 10:09:16,647 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:16,869 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2025-02-05 10:09:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 10:09:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 19 [2025-02-05 10:09:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:16,870 INFO L225 Difference]: With dead ends: 26 [2025-02-05 10:09:16,870 INFO L226 Difference]: Without dead ends: 24 [2025-02-05 10:09:16,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-02-05 10:09:16,871 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:16,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-05 10:09:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2025-02-05 10:09:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2025-02-05 10:09:16,879 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2025-02-05 10:09:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:16,879 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2025-02-05 10:09:16,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2025-02-05 10:09:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-05 10:09:16,879 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:16,879 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:16,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 10:09:17,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 10:09:17,083 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:17,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1336211549, now seen corresponding path program 5 times [2025-02-05 10:09:17,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:17,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006482740] [2025-02-05 10:09:17,084 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:09:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:17,102 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 5 equivalence classes. [2025-02-05 10:09:17,124 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 10:09:17,127 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 10:09:17,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006482740] [2025-02-05 10:09:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006482740] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31726929] [2025-02-05 10:09:17,225 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:09:17,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:17,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:17,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:17,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 10:09:17,262 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 5 equivalence classes. [2025-02-05 10:09:17,281 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 22 of 22 statements. [2025-02-05 10:09:17,282 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-05 10:09:17,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:17,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 10:09:17,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:17,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:17,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31726929] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:17,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:17,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 17 [2025-02-05 10:09:17,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936845454] [2025-02-05 10:09:17,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:17,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 10:09:17,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:17,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 10:09:17,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2025-02-05 10:09:17,427 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:17,483 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2025-02-05 10:09:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 10:09:17,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-02-05 10:09:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:17,484 INFO L225 Difference]: With dead ends: 42 [2025-02-05 10:09:17,484 INFO L226 Difference]: Without dead ends: 24 [2025-02-05 10:09:17,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2025-02-05 10:09:17,485 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:17,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 10:09:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-05 10:09:17,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-05 10:09:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2025-02-05 10:09:17,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2025-02-05 10:09:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:17,491 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2025-02-05 10:09:17,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2025-02-05 10:09:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-05 10:09:17,492 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:17,492 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:17,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 10:09:17,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:17,693 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:17,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -754750262, now seen corresponding path program 6 times [2025-02-05 10:09:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:17,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802338412] [2025-02-05 10:09:17,694 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:09:17,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:17,699 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 5 equivalence classes. [2025-02-05 10:09:17,711 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 10:09:17,711 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 10:09:17,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:18,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802338412] [2025-02-05 10:09:18,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802338412] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346883107] [2025-02-05 10:09:18,037 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:09:18,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:18,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:18,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 10:09:18,069 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 5 equivalence classes. [2025-02-05 10:09:18,090 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 23 of 23 statements. [2025-02-05 10:09:18,090 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-05 10:09:18,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:18,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 10:09:18,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:18,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 27 [2025-02-05 10:09:18,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:18,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2025-02-05 10:09:18,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:18,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 64 [2025-02-05 10:09:18,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:18,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 76 [2025-02-05 10:09:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:18,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346883107] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:18,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:18,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 30 [2025-02-05 10:09:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307773130] [2025-02-05 10:09:18,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:18,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 10:09:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:18,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 10:09:18,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2025-02-05 10:09:18,850 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:19,551 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2025-02-05 10:09:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-05 10:09:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-02-05 10:09:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:19,552 INFO L225 Difference]: With dead ends: 49 [2025-02-05 10:09:19,552 INFO L226 Difference]: Without dead ends: 29 [2025-02-05 10:09:19,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2025-02-05 10:09:19,553 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:19,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 43 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:09:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-05 10:09:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2025-02-05 10:09:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2025-02-05 10:09:19,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2025-02-05 10:09:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:19,560 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2025-02-05 10:09:19,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2025-02-05 10:09:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 10:09:19,561 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:19,561 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:19,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 10:09:19,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 10:09:19,762 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:19,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash -391991730, now seen corresponding path program 7 times [2025-02-05 10:09:19,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:19,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201983601] [2025-02-05 10:09:19,763 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:09:19,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:19,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 10:09:19,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 10:09:19,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:19,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201983601] [2025-02-05 10:09:20,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201983601] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579439909] [2025-02-05 10:09:20,279 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:09:20,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:20,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:20,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 10:09:20,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 10:09:20,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 10:09:20,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:20,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:20,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-05 10:09:20,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:20,352 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 28 treesize of output 29 [2025-02-05 10:09:20,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:20,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 51 [2025-02-05 10:09:20,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:20,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 68 [2025-02-05 10:09:20,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:20,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 85 [2025-02-05 10:09:20,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:20,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 99 [2025-02-05 10:09:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:20,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:21,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579439909] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:21,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:21,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2025-02-05 10:09:21,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466270318] [2025-02-05 10:09:21,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:21,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-05 10:09:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:21,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-05 10:09:21,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 10:09:21,195 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:21,925 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2025-02-05 10:09:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 10:09:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-02-05 10:09:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:21,926 INFO L225 Difference]: With dead ends: 34 [2025-02-05 10:09:21,926 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 10:09:21,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=675, Invalid=2405, Unknown=0, NotChecked=0, Total=3080 [2025-02-05 10:09:21,928 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:21,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 49 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:09:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 10:09:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2025-02-05 10:09:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2025-02-05 10:09:21,941 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2025-02-05 10:09:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:21,941 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2025-02-05 10:09:21,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2025-02-05 10:09:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 10:09:21,941 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:21,942 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:21,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 10:09:22,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:22,142 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:22,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash 191322205, now seen corresponding path program 8 times [2025-02-05 10:09:22,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:22,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495777388] [2025-02-05 10:09:22,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:09:22,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:22,153 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-05 10:09:22,158 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 10:09:22,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:09:22,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:22,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495777388] [2025-02-05 10:09:22,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495777388] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:22,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047548994] [2025-02-05 10:09:22,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:09:22,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:22,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:22,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:22,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 10:09:22,407 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-05 10:09:22,429 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 10:09:22,429 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:09:22,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:22,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 10:09:22,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:22,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047548994] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:22,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 24 [2025-02-05 10:09:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562928654] [2025-02-05 10:09:22,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:22,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 10:09:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:22,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 10:09:22,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=324, Unknown=0, NotChecked=0, Total=552 [2025-02-05 10:09:22,742 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:22,836 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2025-02-05 10:09:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 10:09:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2025-02-05 10:09:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:22,837 INFO L225 Difference]: With dead ends: 56 [2025-02-05 10:09:22,837 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 10:09:22,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=324, Unknown=0, NotChecked=0, Total=552 [2025-02-05 10:09:22,838 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:22,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 10:09:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 10:09:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2025-02-05 10:09:22,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2025-02-05 10:09:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:22,853 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2025-02-05 10:09:22,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2025-02-05 10:09:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 10:09:22,853 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:22,854 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:22,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 10:09:23,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:23,054 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:23,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1949634506, now seen corresponding path program 9 times [2025-02-05 10:09:23,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:23,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842165872] [2025-02-05 10:09:23,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:09:23,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:23,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 7 equivalence classes. [2025-02-05 10:09:23,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 10:09:23,097 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 10:09:23,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842165872] [2025-02-05 10:09:24,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842165872] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:24,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76665975] [2025-02-05 10:09:24,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:09:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:24,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:24,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 10:09:24,125 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 7 equivalence classes. [2025-02-05 10:09:24,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 10:09:24,195 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-05 10:09:24,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:24,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 10:09:24,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:24,229 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 26 treesize of output 27 [2025-02-05 10:09:24,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:24,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 48 [2025-02-05 10:09:24,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:24,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 64 [2025-02-05 10:09:24,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:24,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 80 [2025-02-05 10:09:24,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:24,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 96 [2025-02-05 10:09:24,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:24,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 22 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 108 [2025-02-05 10:09:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:25,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76665975] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:25,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 47 [2025-02-05 10:09:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103191894] [2025-02-05 10:09:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:25,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-05 10:09:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:25,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-05 10:09:25,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2025-02-05 10:09:25,812 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 47 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 47 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:27,433 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2025-02-05 10:09:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-05 10:09:27,434 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 47 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-02-05 10:09:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:27,436 INFO L225 Difference]: With dead ends: 63 [2025-02-05 10:09:27,436 INFO L226 Difference]: Without dead ends: 37 [2025-02-05 10:09:27,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1296, Invalid=5184, Unknown=0, NotChecked=0, Total=6480 [2025-02-05 10:09:27,437 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:27,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 62 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 10:09:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-05 10:09:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2025-02-05 10:09:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2025-02-05 10:09:27,452 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2025-02-05 10:09:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:27,452 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2025-02-05 10:09:27,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 47 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2025-02-05 10:09:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 10:09:27,452 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:27,452 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:27,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 10:09:27,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:27,653 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:27,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2113924686, now seen corresponding path program 10 times [2025-02-05 10:09:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:27,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616836339] [2025-02-05 10:09:27,654 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:09:27,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:27,662 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-05 10:09:27,670 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 32 of 35 statements. [2025-02-05 10:09:27,670 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:09:27,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 7 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:28,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:28,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616836339] [2025-02-05 10:09:28,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616836339] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:28,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061840287] [2025-02-05 10:09:28,075 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:09:28,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:28,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:28,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:28,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 10:09:28,127 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-05 10:09:28,143 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 32 of 35 statements. [2025-02-05 10:09:28,144 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:09:28,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:28,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-05 10:09:28,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:28,149 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 28 treesize of output 29 [2025-02-05 10:09:28,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:28,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 51 [2025-02-05 10:09:28,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:28,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 68 [2025-02-05 10:09:28,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:28,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 85 [2025-02-05 10:09:28,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:28,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 102 [2025-02-05 10:09:28,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:28,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 113 treesize of output 119 [2025-02-05 10:09:28,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:28,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 133 [2025-02-05 10:09:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:29,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 7 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:29,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061840287] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:29,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:29,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 34 [2025-02-05 10:09:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993704391] [2025-02-05 10:09:29,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:29,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-05 10:09:29,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:29,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-05 10:09:29,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 10:09:29,392 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:29,843 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2025-02-05 10:09:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-05 10:09:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-02-05 10:09:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:29,844 INFO L225 Difference]: With dead ends: 42 [2025-02-05 10:09:29,844 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 10:09:29,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2025-02-05 10:09:29,844 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:29,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 10:09:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 10:09:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-02-05 10:09:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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) [2025-02-05 10:09:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2025-02-05 10:09:29,858 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2025-02-05 10:09:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:29,859 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2025-02-05 10:09:29,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2025-02-05 10:09:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 10:09:29,859 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:29,859 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:29,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 10:09:30,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-05 10:09:30,061 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:30,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1174267811, now seen corresponding path program 11 times [2025-02-05 10:09:30,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:30,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712720337] [2025-02-05 10:09:30,062 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:09:30,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:30,076 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 9 equivalence classes. [2025-02-05 10:09:30,091 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 10:09:30,091 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-05 10:09:30,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 100 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:30,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712720337] [2025-02-05 10:09:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712720337] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310940658] [2025-02-05 10:09:30,215 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:09:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:30,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 10:09:30,261 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 9 equivalence classes. [2025-02-05 10:09:30,332 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 10:09:30,333 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-05 10:09:30,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:30,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-05 10:09:30,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 100 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:30,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 100 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310940658] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:30,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 29 [2025-02-05 10:09:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441814380] [2025-02-05 10:09:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:30,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 10:09:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:30,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 10:09:30,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=470, Unknown=0, NotChecked=0, Total=812 [2025-02-05 10:09:30,605 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:30,712 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2025-02-05 10:09:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-05 10:09:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-02-05 10:09:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:30,713 INFO L225 Difference]: With dead ends: 70 [2025-02-05 10:09:30,713 INFO L226 Difference]: Without dead ends: 40 [2025-02-05 10:09:30,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=342, Invalid=470, Unknown=0, NotChecked=0, Total=812 [2025-02-05 10:09:30,714 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:30,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-02-05 10:09:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-02-05 10:09:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2025-02-05 10:09:30,729 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2025-02-05 10:09:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:30,730 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2025-02-05 10:09:30,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2025-02-05 10:09:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 10:09:30,731 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:30,731 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:30,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 10:09:30,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 10:09:30,931 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:30,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:30,931 INFO L85 PathProgramCache]: Analyzing trace with hash 306975434, now seen corresponding path program 12 times [2025-02-05 10:09:30,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:30,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606709035] [2025-02-05 10:09:30,931 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:09:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:30,939 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 9 equivalence classes. [2025-02-05 10:09:30,962 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 10:09:30,962 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-05 10:09:30,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:31,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:31,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606709035] [2025-02-05 10:09:31,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606709035] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:31,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786665597] [2025-02-05 10:09:31,838 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:09:31,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:31,840 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:31,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 10:09:31,895 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 9 equivalence classes. [2025-02-05 10:09:31,981 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 10:09:31,981 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-05 10:09:31,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:31,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-05 10:09:31,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:31,997 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 26 treesize of output 27 [2025-02-05 10:09:32,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 48 [2025-02-05 10:09:32,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 64 [2025-02-05 10:09:32,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 80 [2025-02-05 10:09:32,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 96 [2025-02-05 10:09:32,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 105 treesize of output 112 [2025-02-05 10:09:32,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 118 treesize of output 128 [2025-02-05 10:09:32,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:32,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 37 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 140 [2025-02-05 10:09:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 29 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:33,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786665597] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:33,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 57 [2025-02-05 10:09:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542191357] [2025-02-05 10:09:33,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:33,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-05 10:09:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:33,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-05 10:09:33,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 10:09:33,656 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 57 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:35,834 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2025-02-05 10:09:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-02-05 10:09:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 57 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-02-05 10:09:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:35,835 INFO L225 Difference]: With dead ends: 77 [2025-02-05 10:09:35,835 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 10:09:35,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1871, Invalid=7831, Unknown=0, NotChecked=0, Total=9702 [2025-02-05 10:09:35,837 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 97 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:35,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 62 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 10:09:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 10:09:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2025-02-05 10:09:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 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) [2025-02-05 10:09:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2025-02-05 10:09:35,854 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2025-02-05 10:09:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:35,855 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2025-02-05 10:09:35,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 57 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2025-02-05 10:09:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 10:09:35,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:35,855 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:35,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-05 10:09:36,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:36,056 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:36,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash 394841678, now seen corresponding path program 13 times [2025-02-05 10:09:36,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:36,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015065634] [2025-02-05 10:09:36,057 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:09:36,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:36,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 10:09:36,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 10:09:36,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:36,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015065634] [2025-02-05 10:09:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015065634] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017809736] [2025-02-05 10:09:36,578 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-05 10:09:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:36,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:36,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 10:09:36,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 10:09:36,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 10:09:36,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 10:09:36,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:36,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-05 10:09:36,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:36,665 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 28 treesize of output 29 [2025-02-05 10:09:36,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 51 [2025-02-05 10:09:36,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 68 [2025-02-05 10:09:36,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 85 [2025-02-05 10:09:36,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 102 [2025-02-05 10:09:36,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 113 treesize of output 119 [2025-02-05 10:09:36,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 127 treesize of output 136 [2025-02-05 10:09:36,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:36,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 153 [2025-02-05 10:09:37,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:37,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 152 treesize of output 167 [2025-02-05 10:09:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 37 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:38,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017809736] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:38,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 44 [2025-02-05 10:09:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889302182] [2025-02-05 10:09:38,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:38,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-05 10:09:38,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:38,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-05 10:09:38,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1466, Unknown=0, NotChecked=0, Total=1892 [2025-02-05 10:09:38,563 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:39,287 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2025-02-05 10:09:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 10:09:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 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 43 [2025-02-05 10:09:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:39,288 INFO L225 Difference]: With dead ends: 50 [2025-02-05 10:09:39,288 INFO L226 Difference]: Without dead ends: 48 [2025-02-05 10:09:39,288 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=710, Invalid=2260, Unknown=0, NotChecked=0, Total=2970 [2025-02-05 10:09:39,289 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:39,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 56 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 10:09:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-05 10:09:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2025-02-05 10:09:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2025-02-05 10:09:39,309 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2025-02-05 10:09:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:39,309 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2025-02-05 10:09:39,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2025-02-05 10:09:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-05 10:09:39,310 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:39,310 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:39,323 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 [2025-02-05 10:09:39,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:39,511 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:39,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1186121635, now seen corresponding path program 14 times [2025-02-05 10:09:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87524469] [2025-02-05 10:09:39,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:09:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:39,521 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-02-05 10:09:39,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 10:09:39,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:09:39,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 127 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:39,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:39,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87524469] [2025-02-05 10:09:39,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87524469] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:39,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003471852] [2025-02-05 10:09:39,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 10:09:39,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:39,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:39,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 10:09:39,763 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-02-05 10:09:39,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-05 10:09:39,785 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 10:09:39,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:39,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 10:09:39,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 155 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:39,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 155 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:40,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003471852] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:40,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:40,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 36 [2025-02-05 10:09:40,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688909518] [2025-02-05 10:09:40,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:40,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-05 10:09:40,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:40,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-05 10:09:40,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 10:09:40,179 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:40,319 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2025-02-05 10:09:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 10:09:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 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 46 [2025-02-05 10:09:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:40,320 INFO L225 Difference]: With dead ends: 84 [2025-02-05 10:09:40,321 INFO L226 Difference]: Without dead ends: 48 [2025-02-05 10:09:40,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2025-02-05 10:09:40,321 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:40,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-05 10:09:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-02-05 10:09:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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) [2025-02-05 10:09:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2025-02-05 10:09:40,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2025-02-05 10:09:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:40,345 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2025-02-05 10:09:40,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2025-02-05 10:09:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 10:09:40,346 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:40,346 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:40,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-05 10:09:40,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-05 10:09:40,551 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:40,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1373604406, now seen corresponding path program 15 times [2025-02-05 10:09:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138795478] [2025-02-05 10:09:40,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:09:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:40,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 11 equivalence classes. [2025-02-05 10:09:40,651 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 10:09:40,651 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-05 10:09:40,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 108 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:42,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138795478] [2025-02-05 10:09:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138795478] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052393239] [2025-02-05 10:09:42,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 10:09:42,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:42,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:42,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-05 10:09:42,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 47 statements into 11 equivalence classes. [2025-02-05 10:09:43,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 10:09:43,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-02-05 10:09:43,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:43,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjuncts are in the unsatisfiable core [2025-02-05 10:09:43,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:43,216 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 26 treesize of output 27 [2025-02-05 10:09:43,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 48 [2025-02-05 10:09:43,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 64 [2025-02-05 10:09:43,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 80 [2025-02-05 10:09:43,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 96 [2025-02-05 10:09:43,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 105 treesize of output 112 [2025-02-05 10:09:43,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 118 treesize of output 128 [2025-02-05 10:09:43,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 144 [2025-02-05 10:09:43,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 144 treesize of output 160 [2025-02-05 10:09:43,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:43,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 56 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 153 treesize of output 172 [2025-02-05 10:09:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 46 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:45,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052393239] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:45,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:45,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25] total 71 [2025-02-05 10:09:45,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810096132] [2025-02-05 10:09:45,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:45,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-02-05 10:09:45,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:45,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-02-05 10:09:45,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=4155, Unknown=0, NotChecked=0, Total=4970 [2025-02-05 10:09:45,763 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 71 states, 71 states have (on average 1.8873239436619718) internal successors, (134), 71 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:49,596 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2025-02-05 10:09:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-02-05 10:09:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.8873239436619718) internal successors, (134), 71 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-02-05 10:09:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:49,597 INFO L225 Difference]: With dead ends: 91 [2025-02-05 10:09:49,597 INFO L226 Difference]: Without dead ends: 53 [2025-02-05 10:09:49,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2648, Invalid=11632, Unknown=0, NotChecked=0, Total=14280 [2025-02-05 10:09:49,600 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 145 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:49,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 78 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-05 10:09:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-05 10:09:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2025-02-05 10:09:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2025-02-05 10:09:49,627 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2025-02-05 10:09:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:49,627 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2025-02-05 10:09:49,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.8873239436619718) internal successors, (134), 71 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2025-02-05 10:09:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 10:09:49,627 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:49,628 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:49,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-05 10:09:49,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-05 10:09:49,828 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:49,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 140856910, now seen corresponding path program 16 times [2025-02-05 10:09:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:49,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404683580] [2025-02-05 10:09:49,828 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:09:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:49,838 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-02-05 10:09:49,848 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 48 of 51 statements. [2025-02-05 10:09:49,848 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:09:49,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 11 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:50,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:50,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404683580] [2025-02-05 10:09:50,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404683580] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:50,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487560470] [2025-02-05 10:09:50,457 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 10:09:50,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:50,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:50,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-05 10:09:50,535 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-02-05 10:09:50,573 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 48 of 51 statements. [2025-02-05 10:09:50,573 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 10:09:50,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:50,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-02-05 10:09:50,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:50,579 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 28 treesize of output 29 [2025-02-05 10:09:50,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 51 [2025-02-05 10:09:50,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 68 [2025-02-05 10:09:50,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 85 [2025-02-05 10:09:50,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 102 [2025-02-05 10:09:50,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 113 treesize of output 119 [2025-02-05 10:09:50,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 127 treesize of output 136 [2025-02-05 10:09:50,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 153 [2025-02-05 10:09:50,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:50,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 155 treesize of output 170 [2025-02-05 10:09:51,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:51,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 169 treesize of output 187 [2025-02-05 10:09:51,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 10:09:51,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 180 treesize of output 201 [2025-02-05 10:09:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 56 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:52,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 11 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487560470] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:53,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:53,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 51 [2025-02-05 10:09:53,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098033808] [2025-02-05 10:09:53,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:53,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-02-05 10:09:53,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:53,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-02-05 10:09:53,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2025-02-05 10:09:53,350 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:54,335 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2025-02-05 10:09:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-05 10:09:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 51 [2025-02-05 10:09:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:54,336 INFO L225 Difference]: With dead ends: 58 [2025-02-05 10:09:54,336 INFO L226 Difference]: Without dead ends: 56 [2025-02-05 10:09:54,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=964, Invalid=3068, Unknown=0, NotChecked=0, Total=4032 [2025-02-05 10:09:54,337 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:54,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 72 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 10:09:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-05 10:09:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2025-02-05 10:09:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2025-02-05 10:09:54,368 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2025-02-05 10:09:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:54,369 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2025-02-05 10:09:54,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2025-02-05 10:09:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-05 10:09:54,371 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:54,371 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:54,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-05 10:09:54,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-05 10:09:54,572 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:54,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 86030429, now seen corresponding path program 17 times [2025-02-05 10:09:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484347376] [2025-02-05 10:09:54,572 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:09:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:54,581 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 13 equivalence classes. [2025-02-05 10:09:54,599 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 10:09:54,599 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-05 10:09:54,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 222 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:54,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484347376] [2025-02-05 10:09:54,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484347376] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103947504] [2025-02-05 10:09:54,766 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 10:09:54,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:54,771 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:54,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-05 10:09:54,843 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 13 equivalence classes. [2025-02-05 10:09:55,105 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 54 of 54 statements. [2025-02-05 10:09:55,105 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-05 10:09:55,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:55,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 10:09:55,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 222 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:55,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 10:09:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 222 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:55,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103947504] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 10:09:55,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 10:09:55,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 41 [2025-02-05 10:09:55,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912728343] [2025-02-05 10:09:55,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 10:09:55,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 10:09:55,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 10:09:55,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 10:09:55,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=964, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 10:09:55,572 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 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) [2025-02-05 10:09:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 10:09:55,756 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2025-02-05 10:09:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-05 10:09:55,756 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 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 54 [2025-02-05 10:09:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 10:09:55,757 INFO L225 Difference]: With dead ends: 98 [2025-02-05 10:09:55,757 INFO L226 Difference]: Without dead ends: 56 [2025-02-05 10:09:55,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=964, Unknown=0, NotChecked=0, Total=1640 [2025-02-05 10:09:55,757 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 10:09:55,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 10:09:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-05 10:09:55,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-02-05 10:09:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 10:09:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2025-02-05 10:09:55,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2025-02-05 10:09:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 10:09:55,789 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2025-02-05 10:09:55,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 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) [2025-02-05 10:09:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2025-02-05 10:09:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 10:09:55,790 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 10:09:55,790 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2025-02-05 10:09:55,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-05 10:09:55,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:55,994 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 10:09:55,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 10:09:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -427149110, now seen corresponding path program 18 times [2025-02-05 10:09:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 10:09:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027339362] [2025-02-05 10:09:55,994 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:09:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 10:09:56,002 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 55 statements into 13 equivalence classes. [2025-02-05 10:09:56,034 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 10:09:56,034 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 10:09:56,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 10:09:57,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 10:09:57,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027339362] [2025-02-05 10:09:57,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027339362] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 10:09:57,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185855024] [2025-02-05 10:09:57,399 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 10:09:57,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 10:09:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 10:09:57,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 10:09:57,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-05 10:09:57,477 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 55 statements into 13 equivalence classes. [2025-02-05 10:09:57,716 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 10:09:57,716 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-02-05 10:09:57,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 10:09:57,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-02-05 10:09:57,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 10:09:57,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2025-02-05 10:09:57,810 INFO L349 Elim1Store]: treesize reduction 100, result has 19.4 percent of original size [2025-02-05 10:09:57,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2025-02-05 10:09:57,934 INFO L349 Elim1Store]: treesize reduction 244, result has 16.2 percent of original size [2025-02-05 10:09:57,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 88 [2025-02-05 10:09:58,146 INFO L349 Elim1Store]: treesize reduction 408, result has 14.6 percent of original size [2025-02-05 10:09:58,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 101 treesize of output 119 [2025-02-05 10:09:58,546 INFO L349 Elim1Store]: treesize reduction 628, result has 12.9 percent of original size [2025-02-05 10:09:58,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 126 treesize of output 150 [2025-02-05 10:09:59,833 INFO L349 Elim1Store]: treesize reduction 890, result has 11.5 percent of original size [2025-02-05 10:09:59,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 151 treesize of output 181 [2025-02-05 10:10:10,777 INFO L349 Elim1Store]: treesize reduction 1156, result has 10.7 percent of original size [2025-02-05 10:10:10,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 176 treesize of output 212 [2025-02-05 10:10:38,455 INFO L349 Elim1Store]: treesize reduction 1498, result has 9.8 percent of original size [2025-02-05 10:10:38,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 201 treesize of output 243