./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pr2.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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 16:59:21,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 16:59:21,387 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 16:59:21,393 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 16:59:21,393 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 16:59:21,410 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 16:59:21,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 16:59:21,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 16:59:21,411 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 16:59:21,411 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 16:59:21,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 16:59:21,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 16:59:21,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 16:59:21,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 16:59:21,411 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 16:59:21,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 16:59:21,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 16:59:21,412 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 16:59:21,412 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:59:21,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 16:59:21,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 16:59:21,414 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 16:59:21,414 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 16:59:21,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 16:59:21,414 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 -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2025-02-07 16:59:21,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 16:59:21,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 16:59:21,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 16:59:21,679 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 16:59:21,679 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 16:59:21,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2025-02-07 16:59:22,967 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4ba37e3c1/9dfeb587e2624de3ac63e1cedb6ebeae/FLAG61589b5e8 [2025-02-07 16:59:23,226 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 16:59:23,227 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2025-02-07 16:59:23,237 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4ba37e3c1/9dfeb587e2624de3ac63e1cedb6ebeae/FLAG61589b5e8 [2025-02-07 16:59:23,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4ba37e3c1/9dfeb587e2624de3ac63e1cedb6ebeae [2025-02-07 16:59:23,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 16:59:23,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 16:59:23,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 16:59:23,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 16:59:23,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 16:59:23,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f7bfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23, skipping insertion in model container [2025-02-07 16:59:23,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,551 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 16:59:23,672 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/pr2.c[394,407] [2025-02-07 16:59:23,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:59:23,697 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 16:59:23,705 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/pr2.c[394,407] [2025-02-07 16:59:23,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:59:23,732 INFO L204 MainTranslator]: Completed translation [2025-02-07 16:59:23,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23 WrapperNode [2025-02-07 16:59:23,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 16:59:23,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 16:59:23,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 16:59:23,734 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 16:59:23,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,759 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2025-02-07 16:59:23,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 16:59:23,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 16:59:23,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 16:59:23,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 16:59:23,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,776 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 4 writes are split as follows [0, 0, 4]. [2025-02-07 16:59:23,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,780 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,780 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,781 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 16:59:23,783 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 16:59:23,783 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 16:59:23,783 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 16:59:23,784 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (1/1) ... [2025-02-07 16:59:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:59:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:23,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 16:59:23,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 16:59:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 16:59:23,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 16:59:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 16:59:23,885 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 16:59:23,887 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 16:59:23,989 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-07 16:59:23,989 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 16:59:23,999 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 16:59:23,999 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 16:59:23,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:59:23 BoogieIcfgContainer [2025-02-07 16:59:24,002 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 16:59:24,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 16:59:24,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 16:59:24,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 16:59:24,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 04:59:23" (1/3) ... [2025-02-07 16:59:24,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adc20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:59:24, skipping insertion in model container [2025-02-07 16:59:24,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:59:23" (2/3) ... [2025-02-07 16:59:24,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adc20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:59:24, skipping insertion in model container [2025-02-07 16:59:24,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:59:23" (3/3) ... [2025-02-07 16:59:24,011 INFO L128 eAbstractionObserver]: Analyzing ICFG pr2.c [2025-02-07 16:59:24,023 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 16:59:24,024 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG pr2.c that has 1 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-07 16:59:24,059 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 16:59:24,066 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;@399866f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 16:59:24,066 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 16:59:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 16:59:24,072 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:24,072 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:24,072 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:24,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash 471203222, now seen corresponding path program 1 times [2025-02-07 16:59:24,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:24,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116542769] [2025-02-07 16:59:24,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:24,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 16:59:24,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 16:59:24,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:24,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116542769] [2025-02-07 16:59:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116542769] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:24,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:24,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 16:59:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155505138] [2025-02-07 16:59:24,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:24,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 16:59:24,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:24,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 16:59:24,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 16:59:24,229 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:24,236 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2025-02-07 16:59:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 16:59:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-07 16:59:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:24,241 INFO L225 Difference]: With dead ends: 35 [2025-02-07 16:59:24,241 INFO L226 Difference]: Without dead ends: 16 [2025-02-07 16:59:24,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 16:59:24,244 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:24,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-02-07 16:59:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-02-07 16:59:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2025-02-07 16:59:24,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2025-02-07 16:59:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:24,266 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2025-02-07 16:59:24,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2025-02-07 16:59:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 16:59:24,267 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:24,267 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:24,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 16:59:24,267 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:24,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2080953739, now seen corresponding path program 1 times [2025-02-07 16:59:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:24,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403167002] [2025-02-07 16:59:24,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:24,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 16:59:24,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 16:59:24,312 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:24,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:24,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:24,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403167002] [2025-02-07 16:59:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403167002] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:24,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:24,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 16:59:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228403105] [2025-02-07 16:59:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:24,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 16:59:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:24,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 16:59:24,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:59:24,571 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:24,614 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2025-02-07 16:59:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 16:59:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-02-07 16:59:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:24,615 INFO L225 Difference]: With dead ends: 27 [2025-02-07 16:59:24,615 INFO L226 Difference]: Without dead ends: 20 [2025-02-07 16:59:24,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:59:24,616 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:24,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-02-07 16:59:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2025-02-07 16:59:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-02-07 16:59:24,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2025-02-07 16:59:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:24,627 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-02-07 16:59:24,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-02-07 16:59:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 16:59:24,627 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:24,627 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:24,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 16:59:24,628 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:24,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1418760179, now seen corresponding path program 1 times [2025-02-07 16:59:24,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:24,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472607530] [2025-02-07 16:59:24,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:24,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:24,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 16:59:24,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:24,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:24,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472607530] [2025-02-07 16:59:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472607530] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:24,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 16:59:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535844705] [2025-02-07 16:59:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:24,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 16:59:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:24,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 16:59:24,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 16:59:24,768 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:24,807 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-02-07 16:59:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 16:59:24,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 16:59:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:24,808 INFO L225 Difference]: With dead ends: 39 [2025-02-07 16:59:24,809 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 16:59:24,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 16:59:24,809 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:24,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 16:59:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2025-02-07 16:59:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2025-02-07 16:59:24,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2025-02-07 16:59:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:24,813 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2025-02-07 16:59:24,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2025-02-07 16:59:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 16:59:24,814 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:24,814 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:24,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-07 16:59:24,814 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:24,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1133396782, now seen corresponding path program 1 times [2025-02-07 16:59:24,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:24,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553412419] [2025-02-07 16:59:24,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:24,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 16:59:24,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:24,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:24,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:25,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553412419] [2025-02-07 16:59:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553412419] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325637478] [2025-02-07 16:59:25,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:25,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:25,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:25,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:25,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 16:59:25,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 16:59:25,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:25,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:25,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:25,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-07 16:59:25,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:25,362 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 11 treesize of output 7 [2025-02-07 16:59:25,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 16:59:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:25,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:25,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-07 16:59:25,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-02-07 16:59:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:25,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325637478] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:25,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:25,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 17 [2025-02-07 16:59:25,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247067942] [2025-02-07 16:59:25,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:25,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 16:59:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:25,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 16:59:25,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-02-07 16:59:25,523 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:25,851 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2025-02-07 16:59:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-07 16:59:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 16:59:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:25,852 INFO L225 Difference]: With dead ends: 54 [2025-02-07 16:59:25,852 INFO L226 Difference]: Without dead ends: 52 [2025-02-07 16:59:25,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2025-02-07 16:59:25,854 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:25,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 68 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-07 16:59:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2025-02-07 16:59:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2025-02-07 16:59:25,858 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 15 [2025-02-07 16:59:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:25,858 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2025-02-07 16:59:25,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2025-02-07 16:59:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-02-07 16:59:25,858 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:25,858 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:25,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:26,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:26,059 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:26,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1068752654, now seen corresponding path program 1 times [2025-02-07 16:59:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:26,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878172502] [2025-02-07 16:59:26,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:26,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 16:59:26,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:26,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:26,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:26,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878172502] [2025-02-07 16:59:26,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878172502] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940536261] [2025-02-07 16:59:26,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:26,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:26,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:26,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 16:59:26,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-07 16:59:26,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-07 16:59:26,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:26,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:26,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 16:59:26,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:26,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 16:59:26,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-07 16:59:26,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-07 16:59:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:26,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:26,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:26,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-02-07 16:59:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940536261] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:26,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:26,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2025-02-07 16:59:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807394889] [2025-02-07 16:59:26,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:26,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 16:59:26,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:26,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 16:59:26,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-02-07 16:59:26,549 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:26,895 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2025-02-07 16:59:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 16:59:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-02-07 16:59:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:26,896 INFO L225 Difference]: With dead ends: 109 [2025-02-07 16:59:26,896 INFO L226 Difference]: Without dead ends: 92 [2025-02-07 16:59:26,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 16:59:26,897 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:26,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 132 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-02-07 16:59:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 42. [2025-02-07 16:59:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 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) [2025-02-07 16:59:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2025-02-07 16:59:26,907 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 15 [2025-02-07 16:59:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:26,907 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2025-02-07 16:59:26,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2025-02-07 16:59:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 16:59:26,908 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:26,908 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:26,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 16:59:27,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:27,110 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:27,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1206833710, now seen corresponding path program 1 times [2025-02-07 16:59:27,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:27,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016203816] [2025-02-07 16:59:27,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:27,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:27,120 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 16:59:27,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 16:59:27,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:27,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016203816] [2025-02-07 16:59:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016203816] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 16:59:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077958403] [2025-02-07 16:59:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:27,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:59:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:27,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:59:27,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:59:27,145 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:27,161 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2025-02-07 16:59:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:59:27,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-02-07 16:59:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:27,162 INFO L225 Difference]: With dead ends: 60 [2025-02-07 16:59:27,162 INFO L226 Difference]: Without dead ends: 47 [2025-02-07 16:59:27,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:59:27,163 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:27,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-07 16:59:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2025-02-07 16:59:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2025-02-07 16:59:27,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2025-02-07 16:59:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:27,169 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2025-02-07 16:59:27,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2025-02-07 16:59:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 16:59:27,170 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:27,170 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:27,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-07 16:59:27,170 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:27,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1920055238, now seen corresponding path program 1 times [2025-02-07 16:59:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:27,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918769907] [2025-02-07 16:59:27,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:27,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-07 16:59:27,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 16:59:27,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:27,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918769907] [2025-02-07 16:59:27,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918769907] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746503536] [2025-02-07 16:59:27,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:27,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:27,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 16:59:27,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-07 16:59:27,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 16:59:27,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:27,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:27,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 16:59:27,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:27,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 16:59:27,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-07 16:59:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:27,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:27,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 16:59:27,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2025-02-07 16:59:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746503536] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:27,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:27,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-02-07 16:59:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930390953] [2025-02-07 16:59:27,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:27,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 16:59:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:27,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 16:59:27,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-02-07 16:59:27,619 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:27,831 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2025-02-07 16:59:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 16:59:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-02-07 16:59:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:27,833 INFO L225 Difference]: With dead ends: 72 [2025-02-07 16:59:27,833 INFO L226 Difference]: Without dead ends: 63 [2025-02-07 16:59:27,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2025-02-07 16:59:27,834 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:27,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 106 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-07 16:59:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2025-02-07 16:59:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2025-02-07 16:59:27,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 20 [2025-02-07 16:59:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:27,844 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2025-02-07 16:59:27,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2025-02-07 16:59:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-07 16:59:27,847 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:27,847 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:27,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 16:59:28,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:28,048 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:28,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2081509051, now seen corresponding path program 1 times [2025-02-07 16:59:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839179127] [2025-02-07 16:59:28,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:28,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-07 16:59:28,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 16:59:28,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:28,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839179127] [2025-02-07 16:59:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839179127] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264670910] [2025-02-07 16:59:28,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:28,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:28,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 16:59:28,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-07 16:59:28,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-07 16:59:28,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:28,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:28,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 16:59:28,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:28,312 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 11 treesize of output 7 [2025-02-07 16:59:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:28,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:28,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:28,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 16:59:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264670910] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:28,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2025-02-07 16:59:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440836312] [2025-02-07 16:59:28,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:28,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 16:59:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:28,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 16:59:28,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-07 16:59:28,437 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:28,571 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2025-02-07 16:59:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 16:59:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) Word has length 20 [2025-02-07 16:59:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:28,572 INFO L225 Difference]: With dead ends: 76 [2025-02-07 16:59:28,572 INFO L226 Difference]: Without dead ends: 74 [2025-02-07 16:59:28,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2025-02-07 16:59:28,572 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:28,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 80 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-07 16:59:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2025-02-07 16:59:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 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) [2025-02-07 16:59:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2025-02-07 16:59:28,577 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 20 [2025-02-07 16:59:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:28,577 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2025-02-07 16:59:28,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2025-02-07 16:59:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 16:59:28,582 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:28,582 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:28,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:28,782 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,SelfDestructingSolverStorable7 [2025-02-07 16:59:28,782 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:28,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 452209758, now seen corresponding path program 1 times [2025-02-07 16:59:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924450854] [2025-02-07 16:59:28,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:28,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 16:59:28,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 16:59:28,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:28,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 16:59:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:28,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924450854] [2025-02-07 16:59:28,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924450854] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:59:28,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:59:28,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 16:59:28,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893068041] [2025-02-07 16:59:28,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:59:28,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:59:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:28,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:59:28,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:59:28,802 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:28,813 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2025-02-07 16:59:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:59:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-02-07 16:59:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:28,814 INFO L225 Difference]: With dead ends: 70 [2025-02-07 16:59:28,814 INFO L226 Difference]: Without dead ends: 55 [2025-02-07 16:59:28,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:59:28,815 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:28,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:59:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-07 16:59:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2025-02-07 16:59:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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) [2025-02-07 16:59:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2025-02-07 16:59:28,819 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 24 [2025-02-07 16:59:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:28,819 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2025-02-07 16:59:28,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2025-02-07 16:59:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 16:59:28,820 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:28,820 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:28,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-07 16:59:28,820 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:28,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash -578586318, now seen corresponding path program 1 times [2025-02-07 16:59:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155236911] [2025-02-07 16:59:28,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:28,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 16:59:28,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 16:59:28,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:28,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:28,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155236911] [2025-02-07 16:59:28,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155236911] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:28,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632170143] [2025-02-07 16:59:28,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:59:28,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:28,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:28,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 16:59:28,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 16:59:29,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 16:59:29,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:29,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:29,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 16:59:29,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:29,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:29,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632170143] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:29,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:29,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2025-02-07 16:59:29,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329584060] [2025-02-07 16:59:29,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:29,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 16:59:29,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:29,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 16:59:29,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2025-02-07 16:59:29,305 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:29,444 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2025-02-07 16:59:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 16:59:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-02-07 16:59:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:29,445 INFO L225 Difference]: With dead ends: 93 [2025-02-07 16:59:29,445 INFO L226 Difference]: Without dead ends: 64 [2025-02-07 16:59:29,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2025-02-07 16:59:29,446 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:29,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 72 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-07 16:59:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-02-07 16:59:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 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) [2025-02-07 16:59:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2025-02-07 16:59:29,453 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 25 [2025-02-07 16:59:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:29,453 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2025-02-07 16:59:29,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2025-02-07 16:59:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 16:59:29,454 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:29,454 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:29,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:29,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-07 16:59:29,654 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:29,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2144085199, now seen corresponding path program 2 times [2025-02-07 16:59:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223084743] [2025-02-07 16:59:29,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:29,665 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-07 16:59:29,674 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 16:59:29,674 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:29,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223084743] [2025-02-07 16:59:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223084743] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842167906] [2025-02-07 16:59:29,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:29,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:29,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 16:59:29,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-07 16:59:29,948 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 16:59:29,948 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:29,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:29,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-07 16:59:29,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:30,026 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 11 treesize of output 7 [2025-02-07 16:59:30,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 16:59:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:30,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:30,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:30,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 16:59:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:30,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842167906] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:30,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:30,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 23 [2025-02-07 16:59:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102390387] [2025-02-07 16:59:30,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:30,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 16:59:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:30,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 16:59:30,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2025-02-07 16:59:30,245 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:30,732 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2025-02-07 16:59:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-07 16:59:30,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-02-07 16:59:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:30,733 INFO L225 Difference]: With dead ends: 106 [2025-02-07 16:59:30,733 INFO L226 Difference]: Without dead ends: 104 [2025-02-07 16:59:30,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 16:59:30,734 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:30,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 127 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 16:59:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-07 16:59:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 62. [2025-02-07 16:59:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2025-02-07 16:59:30,740 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 29 [2025-02-07 16:59:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:30,741 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2025-02-07 16:59:30,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2025-02-07 16:59:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 16:59:30,741 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:30,741 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:30,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:30,942 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,SelfDestructingSolverStorable10 [2025-02-07 16:59:30,942 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:30,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1829059153, now seen corresponding path program 2 times [2025-02-07 16:59:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513272597] [2025-02-07 16:59:30,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:30,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-07 16:59:30,965 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 16:59:30,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:30,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:31,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:31,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513272597] [2025-02-07 16:59:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513272597] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:31,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638077743] [2025-02-07 16:59:31,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:31,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:31,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:31,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 16:59:31,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-07 16:59:31,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 16:59:31,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:31,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:31,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 16:59:31,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:31,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 16:59:31,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-07 16:59:31,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:31,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 29 treesize of output 13 [2025-02-07 16:59:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:31,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:31,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 16:59:31,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-07 16:59:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638077743] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:31,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:31,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 29 [2025-02-07 16:59:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076585305] [2025-02-07 16:59:31,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:31,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 16:59:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:31,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 16:59:31,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2025-02-07 16:59:31,797 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:32,603 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2025-02-07 16:59:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-07 16:59:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-02-07 16:59:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:32,603 INFO L225 Difference]: With dead ends: 130 [2025-02-07 16:59:32,603 INFO L226 Difference]: Without dead ends: 121 [2025-02-07 16:59:32,605 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=2562, Unknown=0, NotChecked=0, Total=3080 [2025-02-07 16:59:32,605 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 224 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:32,605 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 205 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 16:59:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-02-07 16:59:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 77. [2025-02-07 16:59:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2025-02-07 16:59:32,612 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 29 [2025-02-07 16:59:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:32,612 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2025-02-07 16:59:32,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2025-02-07 16:59:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 16:59:32,614 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:32,614 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:32,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 16:59:32,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:32,815 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:32,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:32,818 INFO L85 PathProgramCache]: Analyzing trace with hash -158404096, now seen corresponding path program 2 times [2025-02-07 16:59:32,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:32,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29652131] [2025-02-07 16:59:32,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:32,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-07 16:59:32,842 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 16:59:32,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:32,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:33,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29652131] [2025-02-07 16:59:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29652131] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137737587] [2025-02-07 16:59:33,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:33,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:33,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:33,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-07 16:59:33,287 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-02-07 16:59:33,303 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 16:59:33,304 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:33,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:33,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 16:59:33,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:33,355 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 11 treesize of output 7 [2025-02-07 16:59:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:33,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:33,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:33,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 16:59:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137737587] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:33,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:33,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 34 [2025-02-07 16:59:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120032283] [2025-02-07 16:59:33,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:33,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 16:59:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:33,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 16:59:33,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 16:59:33,724 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:34,741 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2025-02-07 16:59:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-02-07 16:59:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-02-07 16:59:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:34,742 INFO L225 Difference]: With dead ends: 186 [2025-02-07 16:59:34,742 INFO L226 Difference]: Without dead ends: 136 [2025-02-07 16:59:34,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=860, Invalid=4840, Unknown=0, NotChecked=0, Total=5700 [2025-02-07 16:59:34,743 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 244 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:34,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 183 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 16:59:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-02-07 16:59:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 90. [2025-02-07 16:59:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2025-02-07 16:59:34,750 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 34 [2025-02-07 16:59:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:34,750 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2025-02-07 16:59:34,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2025-02-07 16:59:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 16:59:34,751 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:34,751 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:34,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 16:59:34,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:34,952 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:34,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash 32705135, now seen corresponding path program 3 times [2025-02-07 16:59:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999562503] [2025-02-07 16:59:34,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:34,958 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-02-07 16:59:34,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 16:59:34,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 16:59:34,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:35,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:35,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999562503] [2025-02-07 16:59:35,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999562503] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:35,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466668800] [2025-02-07 16:59:35,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:35,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:35,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:35,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:35,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 16:59:35,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-02-07 16:59:35,256 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 16:59:35,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 16:59:35,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:35,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 16:59:35,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:35,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466668800] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:35,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2025-02-07 16:59:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073712139] [2025-02-07 16:59:35,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:35,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 16:59:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:35,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 16:59:35,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2025-02-07 16:59:35,643 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:35,768 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2025-02-07 16:59:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 16:59:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-02-07 16:59:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:35,770 INFO L225 Difference]: With dead ends: 133 [2025-02-07 16:59:35,770 INFO L226 Difference]: Without dead ends: 103 [2025-02-07 16:59:35,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2025-02-07 16:59:35,771 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 164 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:35,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 90 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-07 16:59:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2025-02-07 16:59:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 93 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2025-02-07 16:59:35,778 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 39 [2025-02-07 16:59:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:35,779 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2025-02-07 16:59:35,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2025-02-07 16:59:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 16:59:35,779 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:35,779 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:35,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:35,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:35,984 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:35,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438132, now seen corresponding path program 3 times [2025-02-07 16:59:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:35,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105394576] [2025-02-07 16:59:35,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:35,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:35,995 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 5 equivalence classes. [2025-02-07 16:59:36,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 16:59:36,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 16:59:36,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:36,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105394576] [2025-02-07 16:59:36,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105394576] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974295978] [2025-02-07 16:59:36,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:36,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:36,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:36,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 16:59:36,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 5 equivalence classes. [2025-02-07 16:59:36,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 43 of 43 statements. [2025-02-07 16:59:36,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-07 16:59:36,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:36,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 16:59:36,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:36,376 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 13 treesize of output 9 [2025-02-07 16:59:36,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-02-07 16:59:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:36,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:36,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:36,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 16:59:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:36,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974295978] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:36,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:36,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 22 [2025-02-07 16:59:36,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701317210] [2025-02-07 16:59:36,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:36,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-07 16:59:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:36,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-07 16:59:36,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-02-07 16:59:36,690 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:37,272 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2025-02-07 16:59:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-07 16:59:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2025-02-07 16:59:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:37,273 INFO L225 Difference]: With dead ends: 166 [2025-02-07 16:59:37,273 INFO L226 Difference]: Without dead ends: 164 [2025-02-07 16:59:37,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=2043, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 16:59:37,276 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 87 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:37,277 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 207 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 16:59:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-02-07 16:59:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2025-02-07 16:59:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2025-02-07 16:59:37,293 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 43 [2025-02-07 16:59:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:37,293 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2025-02-07 16:59:37,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2025-02-07 16:59:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-07 16:59:37,299 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:37,299 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:37,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:37,499 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,SelfDestructingSolverStorable14 [2025-02-07 16:59:37,499 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:37,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 702387052, now seen corresponding path program 4 times [2025-02-07 16:59:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:37,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657397000] [2025-02-07 16:59:37,500 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:59:37,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:37,508 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-02-07 16:59:37,512 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 43 statements. [2025-02-07 16:59:37,512 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 16:59:37,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:37,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:37,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657397000] [2025-02-07 16:59:37,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657397000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:37,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679607990] [2025-02-07 16:59:37,747 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:59:37,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:37,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:37,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:37,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 16:59:37,794 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 43 statements into 2 equivalence classes. [2025-02-07 16:59:37,805 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 43 statements. [2025-02-07 16:59:37,806 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 16:59:37,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:37,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-07 16:59:37,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:37,834 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 19 treesize of output 1 [2025-02-07 16:59:37,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-07 16:59:37,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-02-07 16:59:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:37,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:38,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 16:59:38,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-07 16:59:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679607990] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:38,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 18 [2025-02-07 16:59:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99637780] [2025-02-07 16:59:38,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:38,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 16:59:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:38,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 16:59:38,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2025-02-07 16:59:38,069 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:38,575 INFO L93 Difference]: Finished difference Result 172 states and 195 transitions. [2025-02-07 16:59:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-07 16:59:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 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 [2025-02-07 16:59:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:38,576 INFO L225 Difference]: With dead ends: 172 [2025-02-07 16:59:38,577 INFO L226 Difference]: Without dead ends: 163 [2025-02-07 16:59:38,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 16:59:38,578 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:38,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 193 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 16:59:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-02-07 16:59:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2025-02-07 16:59:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2025-02-07 16:59:38,589 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 43 [2025-02-07 16:59:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:38,590 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2025-02-07 16:59:38,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2025-02-07 16:59:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 16:59:38,590 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:38,591 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:38,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 16:59:38,791 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,SelfDestructingSolverStorable15 [2025-02-07 16:59:38,791 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:38,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:38,791 INFO L85 PathProgramCache]: Analyzing trace with hash -817671680, now seen corresponding path program 5 times [2025-02-07 16:59:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:38,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937995579] [2025-02-07 16:59:38,791 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:59:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:38,798 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 48 statements into 6 equivalence classes. [2025-02-07 16:59:38,809 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 16:59:38,809 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 16:59:38,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:39,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:39,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937995579] [2025-02-07 16:59:39,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937995579] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:39,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875934634] [2025-02-07 16:59:39,150 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:59:39,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:39,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:39,153 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:39,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 16:59:39,200 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 48 statements into 6 equivalence classes. [2025-02-07 16:59:39,236 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 16:59:39,236 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-02-07 16:59:39,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:39,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-07 16:59:39,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:39,290 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 11 treesize of output 7 [2025-02-07 16:59:39,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-07 16:59:39,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 16:59:39,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:39,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2025-02-07 16:59:39,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:39,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2025-02-07 16:59:39,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:39,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2025-02-07 16:59:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:39,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:40,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2025-02-07 16:59:40,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 16:59:40,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 512 treesize of output 448 [2025-02-07 16:59:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:40,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875934634] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:40,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:40,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 43 [2025-02-07 16:59:40,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996726633] [2025-02-07 16:59:40,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:40,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-07 16:59:40,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:40,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-07 16:59:40,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2025-02-07 16:59:40,291 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:42,316 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2025-02-07 16:59:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-02-07 16:59:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 states have internal predecessors, (116), 0 states have call successors, (0), 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 48 [2025-02-07 16:59:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:42,318 INFO L225 Difference]: With dead ends: 205 [2025-02-07 16:59:42,318 INFO L226 Difference]: Without dead ends: 196 [2025-02-07 16:59:42,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1131, Invalid=6525, Unknown=0, NotChecked=0, Total=7656 [2025-02-07 16:59:42,319 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 352 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:42,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 419 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 16:59:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-02-07 16:59:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2025-02-07 16:59:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2025-02-07 16:59:42,333 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 48 [2025-02-07 16:59:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:42,333 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2025-02-07 16:59:42,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 43 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2025-02-07 16:59:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-02-07 16:59:42,334 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:42,334 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:42,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:42,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 16:59:42,538 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:42,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash 260289541, now seen corresponding path program 3 times [2025-02-07 16:59:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:42,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590593072] [2025-02-07 16:59:42,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:42,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:42,549 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 6 equivalence classes. [2025-02-07 16:59:42,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 16:59:42,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 16:59:42,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590593072] [2025-02-07 16:59:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590593072] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387939355] [2025-02-07 16:59:42,967 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:59:42,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:42,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:42,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:42,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-07 16:59:43,021 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 48 statements into 6 equivalence classes. [2025-02-07 16:59:43,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 48 of 48 statements. [2025-02-07 16:59:43,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 16:59:43,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:43,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-07 16:59:43,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:43,100 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 13 treesize of output 9 [2025-02-07 16:59:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:43,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:43,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:43,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 16:59:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:43,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387939355] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:43,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:43,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 33 [2025-02-07 16:59:43,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880253095] [2025-02-07 16:59:43,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:43,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 16:59:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:43,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 16:59:43,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 16:59:43,411 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:45,569 INFO L93 Difference]: Finished difference Result 280 states and 317 transitions. [2025-02-07 16:59:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-02-07 16:59:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 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 48 [2025-02-07 16:59:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:45,570 INFO L225 Difference]: With dead ends: 280 [2025-02-07 16:59:45,570 INFO L226 Difference]: Without dead ends: 200 [2025-02-07 16:59:45,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4856 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1471, Invalid=13049, Unknown=0, NotChecked=0, Total=14520 [2025-02-07 16:59:45,573 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 255 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:45,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 375 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 16:59:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-02-07 16:59:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 132. [2025-02-07 16:59:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 131 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2025-02-07 16:59:45,584 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 48 [2025-02-07 16:59:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:45,584 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2025-02-07 16:59:45,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2025-02-07 16:59:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-07 16:59:45,585 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:45,585 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:45,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 16:59:45,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 16:59:45,786 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:45,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash -162426900, now seen corresponding path program 6 times [2025-02-07 16:59:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40495972] [2025-02-07 16:59:45,786 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 16:59:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:45,793 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 7 equivalence classes. [2025-02-07 16:59:45,802 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 16:59:45,803 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 16:59:45,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40495972] [2025-02-07 16:59:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40495972] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363811996] [2025-02-07 16:59:46,047 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 16:59:46,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:46,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:46,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:46,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-07 16:59:46,120 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 53 statements into 7 equivalence classes. [2025-02-07 16:59:46,153 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 16:59:46,153 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-02-07 16:59:46,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:46,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 16:59:46,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:46,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363811996] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:46,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:46,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2025-02-07 16:59:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313408396] [2025-02-07 16:59:46,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:46,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-07 16:59:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:46,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-07 16:59:46,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1172, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 16:59:46,752 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:46,953 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2025-02-07 16:59:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 16:59:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 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 53 [2025-02-07 16:59:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:46,954 INFO L225 Difference]: With dead ends: 185 [2025-02-07 16:59:46,954 INFO L226 Difference]: Without dead ends: 145 [2025-02-07 16:59:46,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1606, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 16:59:46,955 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:46,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 183 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:59:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-02-07 16:59:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2025-02-07 16:59:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2025-02-07 16:59:46,968 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 53 [2025-02-07 16:59:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:46,968 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2025-02-07 16:59:46,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2025-02-07 16:59:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-07 16:59:46,968 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:46,968 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:46,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 16:59:47,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:47,174 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:47,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash 803796937, now seen corresponding path program 4 times [2025-02-07 16:59:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:47,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028822765] [2025-02-07 16:59:47,174 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:59:47,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:47,185 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-02-07 16:59:47,194 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 55 of 57 statements. [2025-02-07 16:59:47,194 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 16:59:47,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:47,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:47,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028822765] [2025-02-07 16:59:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028822765] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202983473] [2025-02-07 16:59:47,484 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:59:47,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:47,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:47,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-07 16:59:47,550 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-02-07 16:59:47,567 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 55 of 57 statements. [2025-02-07 16:59:47,567 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 16:59:47,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:47,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-07 16:59:47,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:47,708 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 13 treesize of output 9 [2025-02-07 16:59:47,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-02-07 16:59:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:48,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:48,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 16:59:48,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 16:59:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202983473] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:48,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:48,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 17] total 46 [2025-02-07 16:59:48,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946596198] [2025-02-07 16:59:48,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:48,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-07 16:59:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:48,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-07 16:59:48,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2025-02-07 16:59:48,506 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 46 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 46 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:50,694 INFO L93 Difference]: Finished difference Result 266 states and 299 transitions. [2025-02-07 16:59:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-02-07 16:59:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 46 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-02-07 16:59:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:50,695 INFO L225 Difference]: With dead ends: 266 [2025-02-07 16:59:50,695 INFO L226 Difference]: Without dead ends: 264 [2025-02-07 16:59:50,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1210, Invalid=10346, Unknown=0, NotChecked=0, Total=11556 [2025-02-07 16:59:50,697 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:50,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 456 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 16:59:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2025-02-07 16:59:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 146. [2025-02-07 16:59:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 145 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2025-02-07 16:59:50,711 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 57 [2025-02-07 16:59:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:50,711 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2025-02-07 16:59:50,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 46 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2025-02-07 16:59:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-07 16:59:50,712 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:50,712 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:50,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-07 16:59:50,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:50,916 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:50,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1527126569, now seen corresponding path program 7 times [2025-02-07 16:59:50,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:50,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175927489] [2025-02-07 16:59:50,916 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 16:59:50,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:50,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-07 16:59:50,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 16:59:50,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:50,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:51,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175927489] [2025-02-07 16:59:51,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175927489] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424548873] [2025-02-07 16:59:51,271 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 16:59:51,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:51,273 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:51,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-07 16:59:51,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-07 16:59:51,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-07 16:59:51,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:59:51,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:51,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-07 16:59:51,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:51,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-07 16:59:51,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-07 16:59:51,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-02-07 16:59:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:51,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:52,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 16:59:52,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-07 16:59:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:52,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424548873] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:52,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:52,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 46 [2025-02-07 16:59:52,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888205672] [2025-02-07 16:59:52,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:52,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-07 16:59:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:52,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-07 16:59:52,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2025-02-07 16:59:52,165 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:59:55,430 INFO L93 Difference]: Finished difference Result 280 states and 312 transitions. [2025-02-07 16:59:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2025-02-07 16:59:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-02-07 16:59:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:59:55,435 INFO L225 Difference]: With dead ends: 280 [2025-02-07 16:59:55,435 INFO L226 Difference]: Without dead ends: 271 [2025-02-07 16:59:55,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3965 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1512, Invalid=14238, Unknown=0, NotChecked=0, Total=15750 [2025-02-07 16:59:55,436 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 352 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 16:59:55,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 567 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 16:59:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2025-02-07 16:59:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 156. [2025-02-07 16:59:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 155 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2025-02-07 16:59:55,477 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 57 [2025-02-07 16:59:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:59:55,477 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2025-02-07 16:59:55,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 16:59:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2025-02-07 16:59:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-07 16:59:55,478 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:59:55,478 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:59:55,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-07 16:59:55,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:55,678 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:59:55,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:59:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 50493795, now seen corresponding path program 8 times [2025-02-07 16:59:55,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:59:55,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779459581] [2025-02-07 16:59:55,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:59:55,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-02-07 16:59:55,700 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 16:59:55,700 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:55,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 89 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:59:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779459581] [2025-02-07 16:59:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779459581] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:59:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582975659] [2025-02-07 16:59:56,201 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:59:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:59:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:59:56,203 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:59:56,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-07 16:59:56,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-02-07 16:59:56,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 16:59:56,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:59:56,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:59:56,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-02-07 16:59:56,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:59:56,446 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 11 treesize of output 7 [2025-02-07 16:59:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:56,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:59:57,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 16:59:57,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-07 16:59:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 16:59:57,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582975659] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:59:57,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:59:57,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 50 [2025-02-07 16:59:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692885776] [2025-02-07 16:59:57,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:59:57,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-02-07 16:59:57,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:59:57,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-02-07 16:59:57,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2025-02-07 16:59:57,282 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:01,152 INFO L93 Difference]: Finished difference Result 317 states and 348 transitions. [2025-02-07 17:00:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2025-02-07 17:00:01,152 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 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 62 [2025-02-07 17:00:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:01,156 INFO L225 Difference]: With dead ends: 317 [2025-02-07 17:00:01,156 INFO L226 Difference]: Without dead ends: 263 [2025-02-07 17:00:01,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4789 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1894, Invalid=15398, Unknown=0, NotChecked=0, Total=17292 [2025-02-07 17:00:01,164 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 449 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:01,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 601 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2036 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 17:00:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2025-02-07 17:00:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 165. [2025-02-07 17:00:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1097560975609757) internal successors, (182), 164 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 182 transitions. [2025-02-07 17:00:01,184 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 182 transitions. Word has length 62 [2025-02-07 17:00:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:01,184 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 182 transitions. [2025-02-07 17:00:01,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 182 transitions. [2025-02-07 17:00:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-07 17:00:01,187 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:01,187 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:01,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-07 17:00:01,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:01,387 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:01,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1348574006, now seen corresponding path program 4 times [2025-02-07 17:00:01,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:01,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971707233] [2025-02-07 17:00:01,390 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:00:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:01,403 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-02-07 17:00:01,413 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 60 of 62 statements. [2025-02-07 17:00:01,413 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:00:01,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:01,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:01,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971707233] [2025-02-07 17:00:01,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971707233] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:01,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476492036] [2025-02-07 17:00:01,693 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:00:01,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:01,695 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:01,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-07 17:00:01,761 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-02-07 17:00:01,779 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 60 of 62 statements. [2025-02-07 17:00:01,779 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:00:01,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:01,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-07 17:00:01,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:01,795 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 13 treesize of output 9 [2025-02-07 17:00:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:02,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:02,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 17:00:02,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 17:00:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:02,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476492036] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:02,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:02,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 26 [2025-02-07 17:00:02,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731044689] [2025-02-07 17:00:02,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:02,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-07 17:00:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:02,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-07 17:00:02,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2025-02-07 17:00:02,109 INFO L87 Difference]: Start difference. First operand 165 states and 182 transitions. Second operand has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:04,121 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2025-02-07 17:00:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2025-02-07 17:00:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 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 62 [2025-02-07 17:00:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:04,122 INFO L225 Difference]: With dead ends: 388 [2025-02-07 17:00:04,123 INFO L226 Difference]: Without dead ends: 386 [2025-02-07 17:00:04,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6439 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1188, Invalid=16368, Unknown=0, NotChecked=0, Total=17556 [2025-02-07 17:00:04,128 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 159 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:04,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 355 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-07 17:00:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2025-02-07 17:00:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 170. [2025-02-07 17:00:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.106508875739645) internal successors, (187), 169 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2025-02-07 17:00:04,145 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 62 [2025-02-07 17:00:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:04,145 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2025-02-07 17:00:04,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2025-02-07 17:00:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-07 17:00:04,147 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:04,147 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:04,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 17:00:04,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:04,351 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:04,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash 560114537, now seen corresponding path program 5 times [2025-02-07 17:00:04,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:04,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722430905] [2025-02-07 17:00:04,351 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:00:04,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:04,360 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 9 equivalence classes. [2025-02-07 17:00:04,370 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 17:00:04,370 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-07 17:00:04,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722430905] [2025-02-07 17:00:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722430905] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651011271] [2025-02-07 17:00:04,762 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:00:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:04,765 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 17:00:04,838 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 9 equivalence classes. [2025-02-07 17:00:04,895 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 17:00:04,895 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-07 17:00:04,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:04,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 17:00:04,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:05,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651011271] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:05,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:05,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 48 [2025-02-07 17:00:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594497917] [2025-02-07 17:00:05,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:05,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-07 17:00:05,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:05,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-07 17:00:05,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1712, Unknown=0, NotChecked=0, Total=2256 [2025-02-07 17:00:05,756 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 48 states, 48 states have (on average 3.9583333333333335) internal successors, (190), 48 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:06,018 INFO L93 Difference]: Finished difference Result 269 states and 300 transitions. [2025-02-07 17:00:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 17:00:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9583333333333335) internal successors, (190), 48 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2025-02-07 17:00:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:06,020 INFO L225 Difference]: With dead ends: 269 [2025-02-07 17:00:06,020 INFO L226 Difference]: Without dead ends: 187 [2025-02-07 17:00:06,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=700, Invalid=2162, Unknown=0, NotChecked=0, Total=2862 [2025-02-07 17:00:06,021 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 285 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:06,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 186 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 17:00:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2025-02-07 17:00:06,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 178. [2025-02-07 17:00:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1016949152542372) internal successors, (195), 177 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 195 transitions. [2025-02-07 17:00:06,057 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 195 transitions. Word has length 67 [2025-02-07 17:00:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:06,057 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 195 transitions. [2025-02-07 17:00:06,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9583333333333335) internal successors, (190), 48 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 195 transitions. [2025-02-07 17:00:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-07 17:00:06,058 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:06,058 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:06,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-07 17:00:06,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:06,261 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:06,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1211727162, now seen corresponding path program 6 times [2025-02-07 17:00:06,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:06,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446833232] [2025-02-07 17:00:06,262 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:00:06,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:06,275 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 71 statements into 9 equivalence classes. [2025-02-07 17:00:06,307 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:00:06,307 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 17:00:06,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:06,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:06,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446833232] [2025-02-07 17:00:06,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446833232] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:06,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10230809] [2025-02-07 17:00:06,831 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:00:06,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:06,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:06,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 17:00:06,967 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 71 statements into 9 equivalence classes. [2025-02-07 17:00:07,038 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:00:07,038 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-07 17:00:07,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:07,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-07 17:00:07,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:07,058 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 13 treesize of output 9 [2025-02-07 17:00:07,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-02-07 17:00:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:07,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:07,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 17:00:07,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 17:00:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10230809] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:07,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:07,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 32 [2025-02-07 17:00:07,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352164108] [2025-02-07 17:00:07,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:07,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-07 17:00:07,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:07,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-07 17:00:07,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2025-02-07 17:00:07,523 INFO L87 Difference]: Start difference. First operand 178 states and 195 transitions. Second operand has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:09,850 INFO L93 Difference]: Finished difference Result 387 states and 435 transitions. [2025-02-07 17:00:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2025-02-07 17:00:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2025-02-07 17:00:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:09,852 INFO L225 Difference]: With dead ends: 387 [2025-02-07 17:00:09,852 INFO L226 Difference]: Without dead ends: 385 [2025-02-07 17:00:09,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6139 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1332, Invalid=16224, Unknown=0, NotChecked=0, Total=17556 [2025-02-07 17:00:09,853 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 192 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:09,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 516 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-02-07 17:00:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2025-02-07 17:00:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 188. [2025-02-07 17:00:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.106951871657754) internal successors, (207), 187 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 207 transitions. [2025-02-07 17:00:09,874 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 207 transitions. Word has length 71 [2025-02-07 17:00:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:09,874 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 207 transitions. [2025-02-07 17:00:09,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 207 transitions. [2025-02-07 17:00:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-02-07 17:00:09,875 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:09,875 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:09,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-07 17:00:10,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:10,079 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:10,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:10,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1109780966, now seen corresponding path program 9 times [2025-02-07 17:00:10,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:10,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004865933] [2025-02-07 17:00:10,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:00:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:10,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 9 equivalence classes. [2025-02-07 17:00:10,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:00:10,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-07 17:00:10,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:10,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:10,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004865933] [2025-02-07 17:00:10,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004865933] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:10,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563124148] [2025-02-07 17:00:10,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 17:00:10,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:10,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:10,515 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:10,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 17:00:10,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 9 equivalence classes. [2025-02-07 17:00:10,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 71 of 71 statements. [2025-02-07 17:00:10,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-07 17:00:10,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:10,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-07 17:00:10,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:10,910 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 13 treesize of output 9 [2025-02-07 17:00:10,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-07 17:00:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:11,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:11,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 17:00:11,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-07 17:00:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:11,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563124148] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:11,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:11,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2025-02-07 17:00:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088708645] [2025-02-07 17:00:11,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:11,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-02-07 17:00:11,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:11,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-02-07 17:00:11,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2025-02-07 17:00:11,936 INFO L87 Difference]: Start difference. First operand 188 states and 207 transitions. Second operand has 56 states, 56 states have (on average 3.642857142857143) internal successors, (204), 56 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:16,690 INFO L93 Difference]: Finished difference Result 382 states and 419 transitions. [2025-02-07 17:00:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2025-02-07 17:00:16,691 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.642857142857143) internal successors, (204), 56 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2025-02-07 17:00:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:16,692 INFO L225 Difference]: With dead ends: 382 [2025-02-07 17:00:16,692 INFO L226 Difference]: Without dead ends: 373 [2025-02-07 17:00:16,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7848 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2593, Invalid=24139, Unknown=0, NotChecked=0, Total=26732 [2025-02-07 17:00:16,694 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 476 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:16,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 746 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-07 17:00:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2025-02-07 17:00:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 203. [2025-02-07 17:00:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.103960396039604) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 223 transitions. [2025-02-07 17:00:16,735 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 223 transitions. Word has length 71 [2025-02-07 17:00:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:16,735 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 223 transitions. [2025-02-07 17:00:16,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.642857142857143) internal successors, (204), 56 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 223 transitions. [2025-02-07 17:00:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-07 17:00:16,736 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:16,736 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:16,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-02-07 17:00:16,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 17:00:16,936 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:16,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash 56218703, now seen corresponding path program 5 times [2025-02-07 17:00:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818313106] [2025-02-07 17:00:16,937 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:00:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:16,944 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 76 statements into 10 equivalence classes. [2025-02-07 17:00:16,953 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 76 of 76 statements. [2025-02-07 17:00:16,953 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-02-07 17:00:16,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:17,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:17,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818313106] [2025-02-07 17:00:17,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818313106] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:17,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395525240] [2025-02-07 17:00:17,416 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:00:17,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:17,418 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:17,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 17:00:17,492 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 76 statements into 10 equivalence classes. [2025-02-07 17:00:17,581 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 76 of 76 statements. [2025-02-07 17:00:17,581 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-02-07 17:00:17,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:17,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-07 17:00:17,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:17,733 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 11 treesize of output 7 [2025-02-07 17:00:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:18,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:18,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 17:00:18,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 17:00:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395525240] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:18,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:18,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 41 [2025-02-07 17:00:18,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662980914] [2025-02-07 17:00:18,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:18,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-07 17:00:18,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:18,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-07 17:00:18,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 17:00:18,176 INFO L87 Difference]: Start difference. First operand 203 states and 223 transitions. Second operand has 41 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 41 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:21,837 INFO L93 Difference]: Finished difference Result 538 states and 605 transitions. [2025-02-07 17:00:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2025-02-07 17:00:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 41 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2025-02-07 17:00:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:21,839 INFO L225 Difference]: With dead ends: 538 [2025-02-07 17:00:21,839 INFO L226 Difference]: Without dead ends: 536 [2025-02-07 17:00:21,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16138 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2660, Invalid=39570, Unknown=0, NotChecked=0, Total=42230 [2025-02-07 17:00:21,843 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 453 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:21,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 586 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-07 17:00:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2025-02-07 17:00:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 208. [2025-02-07 17:00:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1014492753623188) internal successors, (228), 207 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 228 transitions. [2025-02-07 17:00:21,891 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 228 transitions. Word has length 76 [2025-02-07 17:00:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:21,891 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 228 transitions. [2025-02-07 17:00:21,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 41 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 228 transitions. [2025-02-07 17:00:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-07 17:00:21,892 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:21,892 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:21,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-07 17:00:22,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 17:00:22,096 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:22,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1486856666, now seen corresponding path program 7 times [2025-02-07 17:00:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:22,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024962227] [2025-02-07 17:00:22,096 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:00:22,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:22,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-07 17:00:22,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 17:00:22,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:00:22,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 219 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:22,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024962227] [2025-02-07 17:00:22,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024962227] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:22,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836217054] [2025-02-07 17:00:22,509 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 17:00:22,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:22,514 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:22,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 17:00:22,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-07 17:00:22,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-07 17:00:22,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 17:00:22,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:22,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 17:00:22,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 265 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:23,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 265 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:23,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836217054] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:23,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:23,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 57 [2025-02-07 17:00:23,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858980362] [2025-02-07 17:00:23,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:23,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-07 17:00:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:23,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-07 17:00:23,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=2449, Unknown=0, NotChecked=0, Total=3192 [2025-02-07 17:00:23,656 INFO L87 Difference]: Start difference. First operand 208 states and 228 transitions. Second operand has 57 states, 57 states have (on average 4.0701754385964914) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:24,012 INFO L93 Difference]: Finished difference Result 378 states and 416 transitions. [2025-02-07 17:00:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 17:00:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.0701754385964914) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 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 81 [2025-02-07 17:00:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:24,017 INFO L225 Difference]: With dead ends: 378 [2025-02-07 17:00:24,017 INFO L226 Difference]: Without dead ends: 229 [2025-02-07 17:00:24,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1015, Invalid=3275, Unknown=0, NotChecked=0, Total=4290 [2025-02-07 17:00:24,017 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 252 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:24,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 375 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 17:00:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-02-07 17:00:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 220. [2025-02-07 17:00:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.095890410958904) internal successors, (240), 219 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 240 transitions. [2025-02-07 17:00:24,055 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 240 transitions. Word has length 81 [2025-02-07 17:00:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:24,055 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 240 transitions. [2025-02-07 17:00:24,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.0701754385964914) internal successors, (232), 57 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 240 transitions. [2025-02-07 17:00:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-07 17:00:24,055 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:24,056 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:24,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-07 17:00:24,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 17:00:24,260 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:24,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1082814781, now seen corresponding path program 8 times [2025-02-07 17:00:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:24,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303699264] [2025-02-07 17:00:24,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:00:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:24,273 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-02-07 17:00:24,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-02-07 17:00:24,282 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:00:24,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:24,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303699264] [2025-02-07 17:00:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303699264] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915504958] [2025-02-07 17:00:24,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 17:00:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:24,720 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:24,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-07 17:00:24,802 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-02-07 17:00:24,830 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-02-07 17:00:24,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 17:00:24,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:24,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-02-07 17:00:24,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:25,066 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 11 treesize of output 7 [2025-02-07 17:00:25,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:00:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:25,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:25,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 17:00:25,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 17:00:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915504958] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:25,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:25,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 22] total 47 [2025-02-07 17:00:25,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165099605] [2025-02-07 17:00:25,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:25,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-02-07 17:00:25,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:25,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-02-07 17:00:25,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 17:00:25,736 INFO L87 Difference]: Start difference. First operand 220 states and 240 transitions. Second operand has 47 states, 47 states have (on average 3.765957446808511) internal successors, (177), 47 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:30,475 INFO L93 Difference]: Finished difference Result 529 states and 595 transitions. [2025-02-07 17:00:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2025-02-07 17:00:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.765957446808511) internal successors, (177), 47 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2025-02-07 17:00:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:30,477 INFO L225 Difference]: With dead ends: 529 [2025-02-07 17:00:30,477 INFO L226 Difference]: Without dead ends: 527 [2025-02-07 17:00:30,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18093 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3224, Invalid=44518, Unknown=0, NotChecked=0, Total=47742 [2025-02-07 17:00:30,483 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 444 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 3586 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 3586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:30,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 830 Invalid, 3925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 3586 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-02-07 17:00:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2025-02-07 17:00:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 230. [2025-02-07 17:00:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1004366812227073) internal successors, (252), 229 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 252 transitions. [2025-02-07 17:00:30,512 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 252 transitions. Word has length 85 [2025-02-07 17:00:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:30,512 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 252 transitions. [2025-02-07 17:00:30,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.765957446808511) internal successors, (177), 47 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 252 transitions. [2025-02-07 17:00:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-02-07 17:00:30,513 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:30,513 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:30,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-07 17:00:30,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-07 17:00:30,717 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:30,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:30,717 INFO L85 PathProgramCache]: Analyzing trace with hash 361665187, now seen corresponding path program 10 times [2025-02-07 17:00:30,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:30,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121036760] [2025-02-07 17:00:30,717 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:00:30,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:30,725 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 85 statements into 2 equivalence classes. [2025-02-07 17:00:30,733 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 85 statements. [2025-02-07 17:00:30,734 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:00:30,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:31,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121036760] [2025-02-07 17:00:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121036760] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914422179] [2025-02-07 17:00:31,186 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 17:00:31,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:31,188 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:31,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-02-07 17:00:31,276 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 85 statements into 2 equivalence classes. [2025-02-07 17:00:31,296 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 85 statements. [2025-02-07 17:00:31,296 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 17:00:31,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:31,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-07 17:00:31,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:31,351 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 19 treesize of output 1 [2025-02-07 17:00:31,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-07 17:00:31,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-02-07 17:00:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:31,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:31,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-02-07 17:00:31,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-02-07 17:00:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:31,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914422179] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:31,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:31,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2025-02-07 17:00:31,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088952912] [2025-02-07 17:00:31,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:31,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 17:00:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:31,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 17:00:31,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 17:00:31,937 INFO L87 Difference]: Start difference. First operand 230 states and 252 transitions. Second operand has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:35,762 INFO L93 Difference]: Finished difference Result 539 states and 587 transitions. [2025-02-07 17:00:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2025-02-07 17:00:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2025-02-07 17:00:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:35,764 INFO L225 Difference]: With dead ends: 539 [2025-02-07 17:00:35,764 INFO L226 Difference]: Without dead ends: 530 [2025-02-07 17:00:35,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 149 SyntacticMatches, 12 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10404 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1604, Invalid=26452, Unknown=0, NotChecked=0, Total=28056 [2025-02-07 17:00:35,766 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 173 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 2643 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 2643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:35,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 670 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 2643 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-07 17:00:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2025-02-07 17:00:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 240. [2025-02-07 17:00:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.100418410041841) internal successors, (263), 239 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 263 transitions. [2025-02-07 17:00:35,801 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 263 transitions. Word has length 85 [2025-02-07 17:00:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:35,801 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 263 transitions. [2025-02-07 17:00:35,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 263 transitions. [2025-02-07 17:00:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-07 17:00:35,802 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:35,802 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:35,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-07 17:00:36,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:36,003 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:36,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash 859061545, now seen corresponding path program 11 times [2025-02-07 17:00:36,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625208736] [2025-02-07 17:00:36,004 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:00:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:36,018 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 90 statements into 12 equivalence classes. [2025-02-07 17:00:36,030 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 90 of 90 statements. [2025-02-07 17:00:36,030 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-07 17:00:36,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:36,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:36,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625208736] [2025-02-07 17:00:36,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625208736] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:36,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115672307] [2025-02-07 17:00:36,519 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 17:00:36,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:36,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:36,521 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:36,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-02-07 17:00:36,607 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 90 statements into 12 equivalence classes. [2025-02-07 17:00:36,712 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 90 of 90 statements. [2025-02-07 17:00:36,713 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-07 17:00:36,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:36,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-02-07 17:00:36,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:36,766 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 11 treesize of output 7 [2025-02-07 17:00:36,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-02-07 17:00:36,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-02-07 17:00:36,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:36,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2025-02-07 17:00:36,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:36,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-02-07 17:00:37,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:37,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2025-02-07 17:00:37,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:37,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-02-07 17:00:37,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:37,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2025-02-07 17:00:37,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:37,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-02-07 17:00:37,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:37,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 51 [2025-02-07 17:00:37,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:37,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 55 [2025-02-07 17:00:38,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:38,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 22 [2025-02-07 17:00:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:38,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:39,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 109 [2025-02-07 17:00:39,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-07 17:00:39,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7057 treesize of output 6545 [2025-02-07 17:00:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115672307] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:39,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:39,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 29] total 71 [2025-02-07 17:00:39,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491538357] [2025-02-07 17:00:39,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:39,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-02-07 17:00:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:39,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-02-07 17:00:39,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=4560, Unknown=0, NotChecked=0, Total=4970 [2025-02-07 17:00:39,962 INFO L87 Difference]: Start difference. First operand 240 states and 263 transitions. Second operand has 71 states, 71 states have (on average 3.056338028169014) internal successors, (217), 71 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 17:00:49,012 INFO L93 Difference]: Finished difference Result 451 states and 492 transitions. [2025-02-07 17:00:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2025-02-07 17:00:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.056338028169014) internal successors, (217), 71 states have internal predecessors, (217), 0 states have call successors, (0), 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 90 [2025-02-07 17:00:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 17:00:49,013 INFO L225 Difference]: With dead ends: 451 [2025-02-07 17:00:49,013 INFO L226 Difference]: Without dead ends: 442 [2025-02-07 17:00:49,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 123 SyntacticMatches, 15 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10150 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3980, Invalid=30430, Unknown=0, NotChecked=0, Total=34410 [2025-02-07 17:00:49,015 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 1054 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 5483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-02-07 17:00:49,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 991 Invalid, 5483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-02-07 17:00:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2025-02-07 17:00:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 245. [2025-02-07 17:00:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.098360655737705) internal successors, (268), 244 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 268 transitions. [2025-02-07 17:00:49,051 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 268 transitions. Word has length 90 [2025-02-07 17:00:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 17:00:49,051 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 268 transitions. [2025-02-07 17:00:49,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.056338028169014) internal successors, (217), 71 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 17:00:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 268 transitions. [2025-02-07 17:00:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-07 17:00:49,052 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 17:00:49,052 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 17:00:49,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-02-07 17:00:49,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:49,253 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 17:00:49,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 17:00:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash -805514604, now seen corresponding path program 6 times [2025-02-07 17:00:49,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 17:00:49,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122929172] [2025-02-07 17:00:49,253 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:00:49,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 17:00:49,264 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 12 equivalence classes. [2025-02-07 17:00:49,285 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 90 of 90 statements. [2025-02-07 17:00:49,285 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-02-07 17:00:49,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 225 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:49,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 17:00:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122929172] [2025-02-07 17:00:49,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122929172] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 17:00:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050224267] [2025-02-07 17:00:49,959 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 17:00:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 17:00:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 17:00:49,961 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 17:00:49,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-02-07 17:00:50,055 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 12 equivalence classes. [2025-02-07 17:00:50,418 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 90 of 90 statements. [2025-02-07 17:00:50,418 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-02-07 17:00:50,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 17:00:50,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-07 17:00:50,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 17:00:50,546 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 13 treesize of output 9 [2025-02-07 17:00:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:50,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 17:00:51,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-07 17:00:51,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-07 17:00:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 17:00:51,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050224267] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 17:00:51,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 17:00:51,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 58 [2025-02-07 17:00:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141713258] [2025-02-07 17:00:51,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 17:00:51,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-02-07 17:00:51,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 17:00:51,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-02-07 17:00:51,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2025-02-07 17:00:51,341 INFO L87 Difference]: Start difference. First operand 245 states and 268 transitions. Second operand has 58 states, 58 states have (on average 4.051724137931035) internal successors, (235), 58 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)