./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.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/recursive-simple/fibo_2calls_8-1.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 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:04:30,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:04:30,137 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:04:30,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:04:30,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:04:30,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:04:30,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:04:30,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:04:30,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:04:30,166 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:04:30,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:04:30,166 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:04:30,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:04:30,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:04:30,166 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:04:30,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:04:30,167 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:04:30,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:04:30,167 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:04:30,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:04:30,168 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 -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2025-02-07 21:04:30,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:04:30,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:04:30,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:04:30,441 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:04:30,441 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:04:30,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2025-02-07 21:04:31,603 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b43f011db/45dc874d9f4f42ccad195a0060bdba5e/FLAGb7c65e5b8 [2025-02-07 21:04:31,795 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:04:31,795 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2025-02-07 21:04:31,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b43f011db/45dc874d9f4f42ccad195a0060bdba5e/FLAGb7c65e5b8 [2025-02-07 21:04:32,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b43f011db/45dc874d9f4f42ccad195a0060bdba5e [2025-02-07 21:04:32,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:04:32,175 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:04:32,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:04:32,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:04:32,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:04:32,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2ac347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32, skipping insertion in model container [2025-02-07 21:04:32,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,189 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:04:32,291 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/recursive-simple/fibo_2calls_8-1.c[947,960] [2025-02-07 21:04:32,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:04:32,311 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:04:32,320 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/recursive-simple/fibo_2calls_8-1.c[947,960] [2025-02-07 21:04:32,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:04:32,331 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:04:32,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32 WrapperNode [2025-02-07 21:04:32,332 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:04:32,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:04:32,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:04:32,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:04:32,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,349 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-02-07 21:04:32,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:04:32,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:04:32,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:04:32,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:04:32,354 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,355 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,361 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 21:04:32,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,363 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,363 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,365 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:04:32,365 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:04:32,365 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:04:32,365 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:04:32,366 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (1/1) ... [2025-02-07 21:04:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:04:32,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:32,387 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 21:04:32,393 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 21:04:32,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:04:32,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:04:32,408 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-02-07 21:04:32,408 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-02-07 21:04:32,409 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-02-07 21:04:32,409 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-02-07 21:04:32,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:04:32,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:04:32,443 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:04:32,444 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:04:32,503 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-02-07 21:04:32,514 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-02-07 21:04:32,520 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-07 21:04:32,520 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:04:32,526 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:04:32,526 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:04:32,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:04:32 BoogieIcfgContainer [2025-02-07 21:04:32,527 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:04:32,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:04:32,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:04:32,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:04:32,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:04:32" (1/3) ... [2025-02-07 21:04:32,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a66b5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:04:32, skipping insertion in model container [2025-02-07 21:04:32,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:04:32" (2/3) ... [2025-02-07 21:04:32,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a66b5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:04:32, skipping insertion in model container [2025-02-07 21:04:32,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:04:32" (3/3) ... [2025-02-07 21:04:32,533 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2025-02-07 21:04:32,543 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:04:32,544 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_8-1.c that has 3 procedures, 27 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:04:32,575 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:04:32,582 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;@1d10f455, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:04:32,582 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:04:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 21:04:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 21:04:32,588 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:32,588 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:32,588 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:32,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1202197486, now seen corresponding path program 1 times [2025-02-07 21:04:32,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:32,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766154076] [2025-02-07 21:04:32,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:32,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 21:04:32,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 21:04:32,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:32,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:32,751 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 21:04:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766154076] [2025-02-07 21:04:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766154076] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:04:32,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:04:32,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:04:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198675636] [2025-02-07 21:04:32,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:04:32,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:04:32,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:32,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:04:32,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:32,776 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:32,832 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2025-02-07 21:04:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:04:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2025-02-07 21:04:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:32,838 INFO L225 Difference]: With dead ends: 38 [2025-02-07 21:04:32,838 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 21:04:32,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:32,841 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:32,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 21:04:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2025-02-07 21:04:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 21:04:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2025-02-07 21:04:32,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2025-02-07 21:04:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:32,863 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2025-02-07 21:04:32,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2025-02-07 21:04:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-02-07 21:04:32,864 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:32,865 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:32,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:04:32,865 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:32,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -362024635, now seen corresponding path program 1 times [2025-02-07 21:04:32,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:32,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608148919] [2025-02-07 21:04:32,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:32,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:32,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-07 21:04:32,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-07 21:04:32,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:32,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:32,911 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 21:04:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608148919] [2025-02-07 21:04:32,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608148919] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:04:32,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:04:32,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:04:32,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065002206] [2025-02-07 21:04:32,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:04:32,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:04:32,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:32,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:04:32,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:32,913 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:32,954 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-02-07 21:04:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:04:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-02-07 21:04:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:32,956 INFO L225 Difference]: With dead ends: 32 [2025-02-07 21:04:32,956 INFO L226 Difference]: Without dead ends: 28 [2025-02-07 21:04:32,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:04:32,956 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:32,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:04:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-07 21:04:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2025-02-07 21:04:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 21:04:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2025-02-07 21:04:32,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2025-02-07 21:04:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:32,966 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2025-02-07 21:04:32,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-07 21:04:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2025-02-07 21:04:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-07 21:04:32,969 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:32,969 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:32,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 21:04:32,969 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:32,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1370279311, now seen corresponding path program 1 times [2025-02-07 21:04:32,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:32,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844413749] [2025-02-07 21:04:32,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:32,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 21:04:32,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 21:04:32,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:32,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:04:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844413749] [2025-02-07 21:04:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844413749] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596305422] [2025-02-07 21:04:33,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:33,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:33,113 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 21:04:33,118 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 21:04:33,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-07 21:04:33,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-07 21:04:33,158 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:33,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:33,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:04:33,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:04:33,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:04:33,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596305422] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:33,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:33,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-02-07 21:04:33,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548971605] [2025-02-07 21:04:33,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:33,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 21:04:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:33,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 21:04:33,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-02-07 21:04:33,381 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-07 21:04:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:33,486 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2025-02-07 21:04:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:04:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 22 [2025-02-07 21:04:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:33,487 INFO L225 Difference]: With dead ends: 54 [2025-02-07 21:04:33,487 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 21:04:33,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-02-07 21:04:33,488 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:33,488 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 122 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 21:04:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2025-02-07 21:04:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-02-07 21:04:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2025-02-07 21:04:33,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2025-02-07 21:04:33,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:33,493 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2025-02-07 21:04:33,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-07 21:04:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2025-02-07 21:04:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 21:04:33,493 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:33,493 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:33,500 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 21:04:33,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:33,694 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:33,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1186636893, now seen corresponding path program 1 times [2025-02-07 21:04:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:33,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533270624] [2025-02-07 21:04:33,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:33,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 21:04:33,704 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 21:04:33,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:33,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:04:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:33,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533270624] [2025-02-07 21:04:33,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533270624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:33,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725164054] [2025-02-07 21:04:33,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:33,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:33,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:33,780 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 21:04:33,782 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 21:04:33,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 21:04:33,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 21:04:33,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:33,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:33,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:04:33,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:04:33,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 21:04:34,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725164054] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:34,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:34,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-02-07 21:04:34,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507987602] [2025-02-07 21:04:34,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:34,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 21:04:34,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:34,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 21:04:34,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:04:34,024 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 21:04:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:34,111 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-02-07 21:04:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:04:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2025-02-07 21:04:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:34,113 INFO L225 Difference]: With dead ends: 39 [2025-02-07 21:04:34,113 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 21:04:34,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-07 21:04:34,114 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:34,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 102 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 21:04:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2025-02-07 21:04:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-02-07 21:04:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2025-02-07 21:04:34,119 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2025-02-07 21:04:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:34,119 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2025-02-07 21:04:34,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-07 21:04:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2025-02-07 21:04:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-07 21:04:34,120 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:34,120 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:34,129 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 21:04:34,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:34,325 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:34,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:34,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1599200641, now seen corresponding path program 1 times [2025-02-07 21:04:34,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:34,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760887882] [2025-02-07 21:04:34,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:34,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:34,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-07 21:04:34,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 21:04:34,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:34,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 21:04:34,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760887882] [2025-02-07 21:04:34,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760887882] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:34,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443173045] [2025-02-07 21:04:34,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:34,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:34,390 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 21:04:34,391 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 21:04:34,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-07 21:04:34,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-07 21:04:34,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:34,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:34,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:04:34,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:04:34,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:04:34,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443173045] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:34,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-02-07 21:04:34,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123185038] [2025-02-07 21:04:34,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:34,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 21:04:34,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:34,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 21:04:34,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-02-07 21:04:34,737 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-07 21:04:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:34,853 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2025-02-07 21:04:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 21:04:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2025-02-07 21:04:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:34,855 INFO L225 Difference]: With dead ends: 68 [2025-02-07 21:04:34,855 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 21:04:34,855 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:04:34,856 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:34,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 132 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 21:04:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2025-02-07 21:04:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-07 21:04:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2025-02-07 21:04:34,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 35 [2025-02-07 21:04:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:34,863 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2025-02-07 21:04:34,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-07 21:04:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2025-02-07 21:04:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 21:04:34,864 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:34,864 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:34,870 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 21:04:35,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:35,069 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:35,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -790926898, now seen corresponding path program 1 times [2025-02-07 21:04:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:35,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226117013] [2025-02-07 21:04:35,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:35,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-07 21:04:35,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 21:04:35,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:35,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 21:04:35,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:35,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226117013] [2025-02-07 21:04:35,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226117013] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:35,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562323086] [2025-02-07 21:04:35,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:35,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:35,165 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 21:04:35,169 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 21:04:35,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-07 21:04:35,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 21:04:35,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:35,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:35,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:04:35,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 21:04:35,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 21:04:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562323086] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:35,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-02-07 21:04:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527337725] [2025-02-07 21:04:35,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:35,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 21:04:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:35,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 21:04:35,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-02-07 21:04:35,534 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-07 21:04:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:35,830 INFO L93 Difference]: Finished difference Result 100 states and 160 transitions. [2025-02-07 21:04:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:04:35,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-02-07 21:04:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:35,832 INFO L225 Difference]: With dead ends: 100 [2025-02-07 21:04:35,832 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 21:04:35,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-02-07 21:04:35,834 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:35,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 255 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:04:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 21:04:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2025-02-07 21:04:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-02-07 21:04:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 85 transitions. [2025-02-07 21:04:35,843 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 85 transitions. Word has length 36 [2025-02-07 21:04:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:35,843 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 85 transitions. [2025-02-07 21:04:35,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-02-07 21:04:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 85 transitions. [2025-02-07 21:04:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 21:04:35,849 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:35,849 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:35,855 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 21:04:36,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-07 21:04:36,050 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:36,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 559327794, now seen corresponding path program 1 times [2025-02-07 21:04:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:36,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560813435] [2025-02-07 21:04:36,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:36,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-07 21:04:36,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 21:04:36,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:36,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-07 21:04:36,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560813435] [2025-02-07 21:04:36,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560813435] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046256345] [2025-02-07 21:04:36,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:36,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:36,129 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 21:04:36,131 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 21:04:36,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-07 21:04:36,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 21:04:36,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:36,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:36,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 21:04:36,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-07 21:04:36,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-07 21:04:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046256345] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:36,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:36,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-02-07 21:04:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514870784] [2025-02-07 21:04:36,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:36,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 21:04:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:36,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 21:04:36,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:04:36,607 INFO L87 Difference]: Start difference. First operand 55 states and 85 transitions. Second operand has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-07 21:04:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:36,758 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2025-02-07 21:04:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:04:36,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 50 [2025-02-07 21:04:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:36,760 INFO L225 Difference]: With dead ends: 101 [2025-02-07 21:04:36,760 INFO L226 Difference]: Without dead ends: 97 [2025-02-07 21:04:36,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-02-07 21:04:36,761 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:36,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 164 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-02-07 21:04:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2025-02-07 21:04:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 43 states have internal predecessors, (45), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-02-07 21:04:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2025-02-07 21:04:36,772 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 50 [2025-02-07 21:04:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:36,772 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2025-02-07 21:04:36,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-02-07 21:04:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2025-02-07 21:04:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-02-07 21:04:36,775 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:36,775 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:36,781 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 21:04:36,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:36,976 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:36,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1781014353, now seen corresponding path program 1 times [2025-02-07 21:04:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605612803] [2025-02-07 21:04:36,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:36,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:36,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-02-07 21:04:36,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-02-07 21:04:36,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:36,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-02-07 21:04:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:37,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605612803] [2025-02-07 21:04:37,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605612803] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:37,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237667943] [2025-02-07 21:04:37,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:37,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:37,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:37,127 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 21:04:37,131 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 21:04:37,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-02-07 21:04:37,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-02-07 21:04:37,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:37,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:37,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 21:04:37,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-02-07 21:04:37,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-02-07 21:04:38,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237667943] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:38,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:38,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-02-07 21:04:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899913453] [2025-02-07 21:04:38,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:38,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 21:04:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:38,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 21:04:38,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-02-07 21:04:38,006 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand has 23 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-02-07 21:04:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:38,551 INFO L93 Difference]: Finished difference Result 176 states and 368 transitions. [2025-02-07 21:04:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-07 21:04:38,552 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 106 [2025-02-07 21:04:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:38,554 INFO L225 Difference]: With dead ends: 176 [2025-02-07 21:04:38,557 INFO L226 Difference]: Without dead ends: 103 [2025-02-07 21:04:38,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:04:38,561 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:38,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 338 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 21:04:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-07 21:04:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2025-02-07 21:04:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.180327868852459) internal successors, (72), 63 states have internal predecessors, (72), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-02-07 21:04:38,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 131 transitions. [2025-02-07 21:04:38,578 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 131 transitions. Word has length 106 [2025-02-07 21:04:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:38,578 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 131 transitions. [2025-02-07 21:04:38,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 23 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-02-07 21:04:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 131 transitions. [2025-02-07 21:04:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2025-02-07 21:04:38,580 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:38,580 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:38,591 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 21:04:38,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-07 21:04:38,784 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:38,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1418424683, now seen corresponding path program 1 times [2025-02-07 21:04:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:38,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154141873] [2025-02-07 21:04:38,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:38,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 132 statements into 1 equivalence classes. [2025-02-07 21:04:38,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 132 of 132 statements. [2025-02-07 21:04:38,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:38,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-02-07 21:04:38,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154141873] [2025-02-07 21:04:38,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154141873] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922382082] [2025-02-07 21:04:38,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:04:38,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:38,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:38,984 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 21:04:38,985 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 21:04:39,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 132 statements into 1 equivalence classes. [2025-02-07 21:04:39,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 132 of 132 statements. [2025-02-07 21:04:39,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:39,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:39,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 21:04:39,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 179 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2025-02-07 21:04:39,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 195 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2025-02-07 21:04:40,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922382082] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:40,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:40,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-02-07 21:04:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128700758] [2025-02-07 21:04:40,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:40,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 21:04:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:40,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 21:04:40,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-02-07 21:04:40,145 INFO L87 Difference]: Start difference. First operand 92 states and 131 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-07 21:04:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:40,380 INFO L93 Difference]: Finished difference Result 131 states and 226 transitions. [2025-02-07 21:04:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 21:04:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 132 [2025-02-07 21:04:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:40,382 INFO L225 Difference]: With dead ends: 131 [2025-02-07 21:04:40,382 INFO L226 Difference]: Without dead ends: 127 [2025-02-07 21:04:40,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 248 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-02-07 21:04:40,383 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:40,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 173 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:04:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-02-07 21:04:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2025-02-07 21:04:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-02-07 21:04:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 193 transitions. [2025-02-07 21:04:40,395 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 193 transitions. Word has length 132 [2025-02-07 21:04:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:40,396 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 193 transitions. [2025-02-07 21:04:40,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-07 21:04:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 193 transitions. [2025-02-07 21:04:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2025-02-07 21:04:40,399 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:40,399 INFO L218 NwaCegarLoop]: trace histogram [28, 28, 25, 25, 22, 20, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:40,405 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 21:04:40,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:40,603 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:40,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash -69821144, now seen corresponding path program 2 times [2025-02-07 21:04:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:40,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423868349] [2025-02-07 21:04:40,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:04:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:40,613 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 363 statements into 2 equivalence classes. [2025-02-07 21:04:40,644 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 363 of 363 statements. [2025-02-07 21:04:40,645 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:04:40,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3761 backedges. 119 proven. 755 refuted. 0 times theorem prover too weak. 2887 trivial. 0 not checked. [2025-02-07 21:04:41,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:41,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423868349] [2025-02-07 21:04:41,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423868349] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:41,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451252192] [2025-02-07 21:04:41,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:04:41,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:41,082 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 21:04:41,088 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 21:04:41,152 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 363 statements into 2 equivalence classes. [2025-02-07 21:04:41,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 363 of 363 statements. [2025-02-07 21:04:41,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:04:41,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:41,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 21:04:41,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3761 backedges. 119 proven. 755 refuted. 0 times theorem prover too weak. 2887 trivial. 0 not checked. [2025-02-07 21:04:41,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3761 backedges. 119 proven. 779 refuted. 0 times theorem prover too weak. 2863 trivial. 0 not checked. [2025-02-07 21:04:43,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451252192] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:43,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:43,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2025-02-07 21:04:43,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912205256] [2025-02-07 21:04:43,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:43,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 21:04:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:43,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 21:04:43,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-02-07 21:04:43,555 INFO L87 Difference]: Start difference. First operand 117 states and 193 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) [2025-02-07 21:04:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:43,816 INFO L93 Difference]: Finished difference Result 147 states and 282 transitions. [2025-02-07 21:04:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:04:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) Word has length 363 [2025-02-07 21:04:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:43,820 INFO L225 Difference]: With dead ends: 147 [2025-02-07 21:04:43,820 INFO L226 Difference]: Without dead ends: 143 [2025-02-07 21:04:43,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 716 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-02-07 21:04:43,821 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:43,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 148 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:04:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-02-07 21:04:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2025-02-07 21:04:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 75 states have internal predecessors, (84), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-02-07 21:04:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 179 transitions. [2025-02-07 21:04:43,849 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 179 transitions. Word has length 363 [2025-02-07 21:04:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:43,850 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 179 transitions. [2025-02-07 21:04:43,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) [2025-02-07 21:04:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 179 transitions. [2025-02-07 21:04:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2025-02-07 21:04:43,855 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:43,855 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 27, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 12, 8, 7, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:43,862 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 21:04:44,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:44,056 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:44,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1633129321, now seen corresponding path program 3 times [2025-02-07 21:04:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:44,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236559519] [2025-02-07 21:04:44,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:04:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:44,070 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 431 statements into 27 equivalence classes. [2025-02-07 21:04:44,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 119 of 431 statements. [2025-02-07 21:04:44,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 21:04:44,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5348 backedges. 660 proven. 96 refuted. 0 times theorem prover too weak. 4592 trivial. 0 not checked. [2025-02-07 21:04:44,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:44,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236559519] [2025-02-07 21:04:44,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236559519] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:44,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135023351] [2025-02-07 21:04:44,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:04:44,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:44,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:44,371 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 21:04:44,373 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 21:04:44,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 431 statements into 27 equivalence classes. [2025-02-07 21:04:44,480 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 119 of 431 statements. [2025-02-07 21:04:44,481 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-07 21:04:44,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:44,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 21:04:44,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5348 backedges. 673 proven. 99 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2025-02-07 21:04:44,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5348 backedges. 677 proven. 105 refuted. 0 times theorem prover too weak. 4566 trivial. 0 not checked. [2025-02-07 21:04:45,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135023351] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:45,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:45,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 17 [2025-02-07 21:04:45,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968337442] [2025-02-07 21:04:45,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:45,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 21:04:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:45,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 21:04:45,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:04:45,857 INFO L87 Difference]: Start difference. First operand 112 states and 179 transitions. Second operand has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-07 21:04:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:45,997 INFO L93 Difference]: Finished difference Result 158 states and 291 transitions. [2025-02-07 21:04:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 21:04:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 431 [2025-02-07 21:04:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:46,000 INFO L225 Difference]: With dead ends: 158 [2025-02-07 21:04:46,001 INFO L226 Difference]: Without dead ends: 154 [2025-02-07 21:04:46,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 852 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2025-02-07 21:04:46,002 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:46,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 153 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-02-07 21:04:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 140. [2025-02-07 21:04:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 91 states have (on average 1.164835164835165) internal successors, (106), 93 states have internal predecessors, (106), 26 states have call successors, (26), 10 states have call predecessors, (26), 22 states have return successors, (116), 36 states have call predecessors, (116), 26 states have call successors, (116) [2025-02-07 21:04:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 248 transitions. [2025-02-07 21:04:46,021 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 248 transitions. Word has length 431 [2025-02-07 21:04:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:46,023 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 248 transitions. [2025-02-07 21:04:46,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-02-07 21:04:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 248 transitions. [2025-02-07 21:04:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2025-02-07 21:04:46,028 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:46,028 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 10, 7, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:46,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 21:04:46,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:46,229 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:46,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1431246910, now seen corresponding path program 4 times [2025-02-07 21:04:46,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:46,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678769476] [2025-02-07 21:04:46,230 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:04:46,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:46,240 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 432 statements into 2 equivalence classes. [2025-02-07 21:04:46,257 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 367 of 432 statements. [2025-02-07 21:04:46,257 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:04:46,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 248 proven. 671 refuted. 0 times theorem prover too weak. 4450 trivial. 0 not checked. [2025-02-07 21:04:46,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678769476] [2025-02-07 21:04:46,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678769476] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408492402] [2025-02-07 21:04:46,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:04:46,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:46,596 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 21:04:46,597 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 21:04:46,698 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 432 statements into 2 equivalence classes. [2025-02-07 21:04:46,751 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 367 of 432 statements. [2025-02-07 21:04:46,751 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:04:46,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:46,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 21:04:46,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 1344 proven. 19 refuted. 0 times theorem prover too weak. 4006 trivial. 0 not checked. [2025-02-07 21:04:46,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 248 proven. 776 refuted. 0 times theorem prover too weak. 4345 trivial. 0 not checked. [2025-02-07 21:04:48,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408492402] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:48,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-02-07 21:04:48,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259831091] [2025-02-07 21:04:48,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:48,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 21:04:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:48,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 21:04:48,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:04:48,196 INFO L87 Difference]: Start difference. First operand 140 states and 248 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-07 21:04:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:48,337 INFO L93 Difference]: Finished difference Result 270 states and 533 transitions. [2025-02-07 21:04:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:04:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 432 [2025-02-07 21:04:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:48,339 INFO L225 Difference]: With dead ends: 270 [2025-02-07 21:04:48,339 INFO L226 Difference]: Without dead ends: 137 [2025-02-07 21:04:48,340 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 853 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-02-07 21:04:48,340 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:48,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 182 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-07 21:04:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2025-02-07 21:04:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 91 states have internal predecessors, (101), 25 states have call successors, (25), 11 states have call predecessors, (25), 21 states have return successors, (100), 34 states have call predecessors, (100), 25 states have call successors, (100) [2025-02-07 21:04:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 226 transitions. [2025-02-07 21:04:48,375 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 226 transitions. Word has length 432 [2025-02-07 21:04:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:48,375 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 226 transitions. [2025-02-07 21:04:48,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-02-07 21:04:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 226 transitions. [2025-02-07 21:04:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2025-02-07 21:04:48,379 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:48,379 INFO L218 NwaCegarLoop]: trace histogram [57, 57, 50, 50, 45, 40, 28, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 25, 25, 20, 12, 12, 10, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:48,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 21:04:48,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 21:04:48,580 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:48,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1063546355, now seen corresponding path program 5 times [2025-02-07 21:04:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:48,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185070424] [2025-02-07 21:04:48,581 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:04:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:48,595 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 730 statements into 45 equivalence classes. [2025-02-07 21:04:48,618 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 265 of 730 statements. [2025-02-07 21:04:48,619 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-07 21:04:48,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15766 backedges. 961 proven. 1323 refuted. 0 times theorem prover too weak. 13482 trivial. 0 not checked. [2025-02-07 21:04:48,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185070424] [2025-02-07 21:04:48,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185070424] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433506493] [2025-02-07 21:04:48,871 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:04:48,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:48,876 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 21:04:48,876 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 21:04:49,000 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 730 statements into 45 equivalence classes. [2025-02-07 21:04:49,052 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 265 of 730 statements. [2025-02-07 21:04:49,052 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-07 21:04:49,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:49,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 21:04:49,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15766 backedges. 8603 proven. 129 refuted. 0 times theorem prover too weak. 7034 trivial. 0 not checked. [2025-02-07 21:04:49,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15766 backedges. 962 proven. 1324 refuted. 0 times theorem prover too weak. 13480 trivial. 0 not checked. [2025-02-07 21:04:51,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433506493] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:51,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:51,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 24 [2025-02-07 21:04:51,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545008043] [2025-02-07 21:04:51,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:51,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 21:04:51,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:51,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 21:04:51,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-02-07 21:04:51,446 INFO L87 Difference]: Start difference. First operand 137 states and 226 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 16 states have call successors, (28), 2 states have call predecessors, (28), 8 states have return successors, (31), 11 states have call predecessors, (31), 16 states have call successors, (31) [2025-02-07 21:04:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:51,820 INFO L93 Difference]: Finished difference Result 297 states and 576 transitions. [2025-02-07 21:04:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 21:04:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 16 states have call successors, (28), 2 states have call predecessors, (28), 8 states have return successors, (31), 11 states have call predecessors, (31), 16 states have call successors, (31) Word has length 730 [2025-02-07 21:04:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:51,824 INFO L225 Difference]: With dead ends: 297 [2025-02-07 21:04:51,824 INFO L226 Difference]: Without dead ends: 157 [2025-02-07 21:04:51,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1490 GetRequests, 1446 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2025-02-07 21:04:51,826 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:51,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 280 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:04:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-02-07 21:04:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2025-02-07 21:04:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 94 states have internal predecessors, (107), 26 states have call successors, (26), 13 states have call predecessors, (26), 20 states have return successors, (102), 33 states have call predecessors, (102), 26 states have call successors, (102) [2025-02-07 21:04:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 235 transitions. [2025-02-07 21:04:51,838 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 235 transitions. Word has length 730 [2025-02-07 21:04:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:51,839 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 235 transitions. [2025-02-07 21:04:51,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 16 states have call successors, (28), 2 states have call predecessors, (28), 8 states have return successors, (31), 11 states have call predecessors, (31), 16 states have call successors, (31) [2025-02-07 21:04:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 235 transitions. [2025-02-07 21:04:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2025-02-07 21:04:51,841 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:51,842 INFO L218 NwaCegarLoop]: trace histogram [40, 40, 37, 37, 31, 29, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 11, 11, 11, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:51,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 21:04:52,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-07 21:04:52,042 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:52,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash -799682317, now seen corresponding path program 6 times [2025-02-07 21:04:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:52,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211970398] [2025-02-07 21:04:52,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:04:52,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:52,055 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 525 statements into 30 equivalence classes. [2025-02-07 21:04:52,075 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 172 of 525 statements. [2025-02-07 21:04:52,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-02-07 21:04:52,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8027 backedges. 301 proven. 918 refuted. 0 times theorem prover too weak. 6808 trivial. 0 not checked. [2025-02-07 21:04:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211970398] [2025-02-07 21:04:52,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211970398] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635140211] [2025-02-07 21:04:52,223 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:04:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:52,228 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 21:04:52,230 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 21:04:52,326 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 525 statements into 30 equivalence classes. [2025-02-07 21:04:52,364 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 172 of 525 statements. [2025-02-07 21:04:52,365 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-02-07 21:04:52,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:52,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 21:04:52,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8027 backedges. 1755 proven. 21 refuted. 0 times theorem prover too weak. 6251 trivial. 0 not checked. [2025-02-07 21:04:52,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8027 backedges. 310 proven. 1072 refuted. 0 times theorem prover too weak. 6645 trivial. 0 not checked. [2025-02-07 21:04:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635140211] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:53,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:53,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2025-02-07 21:04:53,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590319869] [2025-02-07 21:04:53,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:53,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 21:04:53,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:53,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 21:04:53,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-02-07 21:04:53,747 INFO L87 Difference]: Start difference. First operand 141 states and 235 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (21), 2 states have call predecessors, (21), 7 states have return successors, (25), 7 states have call predecessors, (25), 10 states have call successors, (25) [2025-02-07 21:04:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:53,978 INFO L93 Difference]: Finished difference Result 281 states and 539 transitions. [2025-02-07 21:04:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 21:04:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (21), 2 states have call predecessors, (21), 7 states have return successors, (25), 7 states have call predecessors, (25), 10 states have call successors, (25) Word has length 525 [2025-02-07 21:04:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:53,980 INFO L225 Difference]: With dead ends: 281 [2025-02-07 21:04:53,980 INFO L226 Difference]: Without dead ends: 145 [2025-02-07 21:04:53,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1037 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2025-02-07 21:04:53,982 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:53,982 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 177 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-02-07 21:04:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2025-02-07 21:04:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 93 states have internal predecessors, (107), 26 states have call successors, (26), 14 states have call predecessors, (26), 19 states have return successors, (95), 32 states have call predecessors, (95), 26 states have call successors, (95) [2025-02-07 21:04:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 228 transitions. [2025-02-07 21:04:53,993 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 228 transitions. Word has length 525 [2025-02-07 21:04:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:53,993 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 228 transitions. [2025-02-07 21:04:53,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (21), 2 states have call predecessors, (21), 7 states have return successors, (25), 7 states have call predecessors, (25), 10 states have call successors, (25) [2025-02-07 21:04:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 228 transitions. [2025-02-07 21:04:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2025-02-07 21:04:53,996 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:53,996 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:54,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 21:04:54,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:54,197 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:54,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash 475980440, now seen corresponding path program 7 times [2025-02-07 21:04:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305305648] [2025-02-07 21:04:54,197 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:04:54,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:54,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 444 statements into 1 equivalence classes. [2025-02-07 21:04:54,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 444 of 444 statements. [2025-02-07 21:04:54,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:54,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 487 proven. 527 refuted. 0 times theorem prover too weak. 4667 trivial. 0 not checked. [2025-02-07 21:04:54,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:54,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305305648] [2025-02-07 21:04:54,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305305648] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:54,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034561265] [2025-02-07 21:04:54,573 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:04:54,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:54,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:54,577 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 21:04:54,599 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 21:04:54,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 444 statements into 1 equivalence classes. [2025-02-07 21:04:54,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 444 of 444 statements. [2025-02-07 21:04:54,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:04:54,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:54,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 21:04:54,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 225 proven. 733 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2025-02-07 21:04:54,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 225 proven. 749 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2025-02-07 21:04:56,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034561265] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:56,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:56,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 29 [2025-02-07 21:04:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354350024] [2025-02-07 21:04:56,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:56,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 21:04:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:56,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 21:04:56,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2025-02-07 21:04:56,502 INFO L87 Difference]: Start difference. First operand 140 states and 228 transitions. Second operand has 29 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 29 states have internal predecessors, (90), 20 states have call successors, (28), 1 states have call predecessors, (28), 13 states have return successors, (34), 18 states have call predecessors, (34), 20 states have call successors, (34) [2025-02-07 21:04:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:57,141 INFO L93 Difference]: Finished difference Result 374 states and 800 transitions. [2025-02-07 21:04:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-07 21:04:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 29 states have internal predecessors, (90), 20 states have call successors, (28), 1 states have call predecessors, (28), 13 states have return successors, (34), 18 states have call predecessors, (34), 20 states have call successors, (34) Word has length 444 [2025-02-07 21:04:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:57,144 INFO L225 Difference]: With dead ends: 374 [2025-02-07 21:04:57,144 INFO L226 Difference]: Without dead ends: 193 [2025-02-07 21:04:57,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 869 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=2281, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 21:04:57,146 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 124 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:57,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 528 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 21:04:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-02-07 21:04:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 181. [2025-02-07 21:04:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 121 states have internal predecessors, (137), 36 states have call successors, (36), 20 states have call predecessors, (36), 22 states have return successors, (136), 39 states have call predecessors, (136), 36 states have call successors, (136) [2025-02-07 21:04:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 309 transitions. [2025-02-07 21:04:57,157 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 309 transitions. Word has length 444 [2025-02-07 21:04:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:04:57,158 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 309 transitions. [2025-02-07 21:04:57,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 29 states have internal predecessors, (90), 20 states have call successors, (28), 1 states have call predecessors, (28), 13 states have return successors, (34), 18 states have call predecessors, (34), 20 states have call successors, (34) [2025-02-07 21:04:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 309 transitions. [2025-02-07 21:04:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2025-02-07 21:04:57,161 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:04:57,161 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 32, 32, 27, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 10, 9, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 21:04:57,168 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 21:04:57,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:57,362 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:04:57,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:04:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash -181891412, now seen corresponding path program 8 times [2025-02-07 21:04:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:04:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737342334] [2025-02-07 21:04:57,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:04:57,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:04:57,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 470 statements into 2 equivalence classes. [2025-02-07 21:04:57,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 470 of 470 statements. [2025-02-07 21:04:57,391 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:04:57,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6416 backedges. 184 proven. 986 refuted. 0 times theorem prover too weak. 5246 trivial. 0 not checked. [2025-02-07 21:04:57,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:04:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737342334] [2025-02-07 21:04:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737342334] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:04:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236138314] [2025-02-07 21:04:57,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:04:57,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:04:57,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:04:57,710 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 21:04:57,711 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 21:04:57,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 470 statements into 2 equivalence classes. [2025-02-07 21:04:57,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 470 of 470 statements. [2025-02-07 21:04:57,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:04:57,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:04:57,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 21:04:57,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:04:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6416 backedges. 184 proven. 986 refuted. 0 times theorem prover too weak. 5246 trivial. 0 not checked. [2025-02-07 21:04:58,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:04:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6416 backedges. 184 proven. 1007 refuted. 0 times theorem prover too weak. 5225 trivial. 0 not checked. [2025-02-07 21:04:59,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236138314] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:04:59,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:04:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2025-02-07 21:04:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599241126] [2025-02-07 21:04:59,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:04:59,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 21:04:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:04:59,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 21:04:59,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-02-07 21:04:59,831 INFO L87 Difference]: Start difference. First operand 181 states and 309 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) [2025-02-07 21:04:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:04:59,978 INFO L93 Difference]: Finished difference Result 262 states and 580 transitions. [2025-02-07 21:04:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 21:04:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) Word has length 470 [2025-02-07 21:04:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:04:59,982 INFO L225 Difference]: With dead ends: 262 [2025-02-07 21:04:59,982 INFO L226 Difference]: Without dead ends: 258 [2025-02-07 21:04:59,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 930 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-02-07 21:04:59,984 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:04:59,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:04:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-02-07 21:05:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 191. [2025-02-07 21:05:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 128 states have (on average 1.1171875) internal successors, (143), 127 states have internal predecessors, (143), 38 states have call successors, (38), 20 states have call predecessors, (38), 24 states have return successors, (151), 43 states have call predecessors, (151), 38 states have call successors, (151) [2025-02-07 21:05:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 332 transitions. [2025-02-07 21:05:00,004 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 332 transitions. Word has length 470 [2025-02-07 21:05:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:00,004 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 332 transitions. [2025-02-07 21:05:00,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 19 states have internal predecessors, (67), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) [2025-02-07 21:05:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 332 transitions. [2025-02-07 21:05:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2025-02-07 21:05:00,008 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:00,008 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:00,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:00,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-07 21:05:00,209 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:00,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 579169099, now seen corresponding path program 9 times [2025-02-07 21:05:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:00,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130305078] [2025-02-07 21:05:00,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:00,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 431 statements into 24 equivalence classes. [2025-02-07 21:05:00,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 159 of 431 statements. [2025-02-07 21:05:00,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 21:05:00,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 745 proven. 140 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2025-02-07 21:05:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130305078] [2025-02-07 21:05:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130305078] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700566600] [2025-02-07 21:05:00,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:00,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:00,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:00,362 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 21:05:00,363 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 21:05:00,484 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 431 statements into 24 equivalence classes. [2025-02-07 21:05:00,514 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 159 of 431 statements. [2025-02-07 21:05:00,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-02-07 21:05:00,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:00,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 21:05:00,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 2106 proven. 33 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2025-02-07 21:05:00,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 824 proven. 162 refuted. 0 times theorem prover too weak. 4366 trivial. 0 not checked. [2025-02-07 21:05:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700566600] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:01,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2025-02-07 21:05:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955252516] [2025-02-07 21:05:01,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:01,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 21:05:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:01,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 21:05:01,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:05:01,837 INFO L87 Difference]: Start difference. First operand 191 states and 332 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 12 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2025-02-07 21:05:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:02,071 INFO L93 Difference]: Finished difference Result 377 states and 704 transitions. [2025-02-07 21:05:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 21:05:02,072 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 12 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 431 [2025-02-07 21:05:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:02,074 INFO L225 Difference]: With dead ends: 377 [2025-02-07 21:05:02,074 INFO L226 Difference]: Without dead ends: 200 [2025-02-07 21:05:02,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 849 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2025-02-07 21:05:02,076 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:02,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 220 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-02-07 21:05:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2025-02-07 21:05:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 134 states have (on average 1.1119402985074627) internal successors, (149), 131 states have internal predecessors, (149), 38 states have call successors, (38), 22 states have call predecessors, (38), 24 states have return successors, (140), 43 states have call predecessors, (140), 38 states have call successors, (140) [2025-02-07 21:05:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 327 transitions. [2025-02-07 21:05:02,088 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 327 transitions. Word has length 431 [2025-02-07 21:05:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:02,089 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 327 transitions. [2025-02-07 21:05:02,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 12 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2025-02-07 21:05:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 327 transitions. [2025-02-07 21:05:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2025-02-07 21:05:02,091 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:02,092 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 30, 28, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:02,098 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 21:05:02,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 21:05:02,293 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:02,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -140797454, now seen corresponding path program 10 times [2025-02-07 21:05:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267766863] [2025-02-07 21:05:02,293 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:02,302 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 511 statements into 2 equivalence classes. [2025-02-07 21:05:02,319 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 434 of 511 statements. [2025-02-07 21:05:02,319 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:05:02,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 300 proven. 1160 refuted. 0 times theorem prover too weak. 6125 trivial. 0 not checked. [2025-02-07 21:05:02,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267766863] [2025-02-07 21:05:02,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267766863] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168325610] [2025-02-07 21:05:02,580 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:02,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:02,583 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 21:05:02,583 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 21:05:02,721 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 511 statements into 2 equivalence classes. [2025-02-07 21:05:02,781 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 434 of 511 statements. [2025-02-07 21:05:02,782 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:05:02,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:02,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 21:05:02,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 3341 proven. 176 refuted. 0 times theorem prover too weak. 4068 trivial. 0 not checked. [2025-02-07 21:05:02,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 316 proven. 1453 refuted. 0 times theorem prover too weak. 5816 trivial. 0 not checked. [2025-02-07 21:05:04,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168325610] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:04,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:04,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 19] total 27 [2025-02-07 21:05:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658650492] [2025-02-07 21:05:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:04,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 21:05:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:04,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 21:05:04,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2025-02-07 21:05:04,959 INFO L87 Difference]: Start difference. First operand 197 states and 327 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 27 states have internal predecessors, (102), 20 states have call successors, (31), 2 states have call predecessors, (31), 11 states have return successors, (37), 11 states have call predecessors, (37), 20 states have call successors, (37) [2025-02-07 21:05:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:05,360 INFO L93 Difference]: Finished difference Result 388 states and 679 transitions. [2025-02-07 21:05:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 21:05:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 27 states have internal predecessors, (102), 20 states have call successors, (31), 2 states have call predecessors, (31), 11 states have return successors, (37), 11 states have call predecessors, (37), 20 states have call successors, (37) Word has length 511 [2025-02-07 21:05:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:05,363 INFO L225 Difference]: With dead ends: 388 [2025-02-07 21:05:05,363 INFO L226 Difference]: Without dead ends: 205 [2025-02-07 21:05:05,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1003 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2025-02-07 21:05:05,365 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:05,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 351 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:05:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-02-07 21:05:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2025-02-07 21:05:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 133 states have internal predecessors, (152), 38 states have call successors, (38), 24 states have call predecessors, (38), 23 states have return successors, (126), 41 states have call predecessors, (126), 38 states have call successors, (126) [2025-02-07 21:05:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 316 transitions. [2025-02-07 21:05:05,377 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 316 transitions. Word has length 511 [2025-02-07 21:05:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:05,377 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 316 transitions. [2025-02-07 21:05:05,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 27 states have internal predecessors, (102), 20 states have call successors, (31), 2 states have call predecessors, (31), 11 states have return successors, (37), 11 states have call predecessors, (37), 20 states have call successors, (37) [2025-02-07 21:05:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 316 transitions. [2025-02-07 21:05:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2025-02-07 21:05:05,380 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:05,380 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 34, 34, 28, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 9, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:05,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-07 21:05:05,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 21:05:05,584 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:05,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:05,584 INFO L85 PathProgramCache]: Analyzing trace with hash 917904470, now seen corresponding path program 11 times [2025-02-07 21:05:05,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:05,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649627056] [2025-02-07 21:05:05,584 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:05,594 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 485 statements into 32 equivalence classes. [2025-02-07 21:05:05,630 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 260 of 485 statements. [2025-02-07 21:05:05,630 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-07 21:05:05,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 662 proven. 254 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2025-02-07 21:05:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649627056] [2025-02-07 21:05:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649627056] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943081307] [2025-02-07 21:05:05,784 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:05:05,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:05,786 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 21:05:05,790 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 21:05:05,932 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 485 statements into 32 equivalence classes. [2025-02-07 21:05:05,981 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 260 of 485 statements. [2025-02-07 21:05:05,982 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-02-07 21:05:05,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:05,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-07 21:05:05,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 3624 proven. 6 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2025-02-07 21:05:06,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 733 proven. 303 refuted. 0 times theorem prover too weak. 5784 trivial. 0 not checked. [2025-02-07 21:05:06,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943081307] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:06,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:06,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-02-07 21:05:06,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740636258] [2025-02-07 21:05:06,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:06,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 21:05:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:06,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 21:05:06,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-02-07 21:05:06,900 INFO L87 Difference]: Start difference. First operand 199 states and 316 transitions. Second operand has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 7 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (20), 4 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-07 21:05:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:06,993 INFO L93 Difference]: Finished difference Result 356 states and 607 transitions. [2025-02-07 21:05:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-07 21:05:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 7 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (20), 4 states have call predecessors, (20), 7 states have call successors, (20) Word has length 485 [2025-02-07 21:05:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:06,995 INFO L225 Difference]: With dead ends: 356 [2025-02-07 21:05:06,995 INFO L226 Difference]: Without dead ends: 174 [2025-02-07 21:05:06,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 960 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-02-07 21:05:06,997 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:06,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 159 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2025-02-07 21:05:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2025-02-07 21:05:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 118 states have internal predecessors, (137), 33 states have call successors, (33), 24 states have call predecessors, (33), 18 states have return successors, (86), 31 states have call predecessors, (86), 33 states have call successors, (86) [2025-02-07 21:05:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 256 transitions. [2025-02-07 21:05:07,008 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 256 transitions. Word has length 485 [2025-02-07 21:05:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:07,008 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 256 transitions. [2025-02-07 21:05:07,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 7 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (20), 4 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-07 21:05:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 256 transitions. [2025-02-07 21:05:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2025-02-07 21:05:07,011 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:07,011 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:07,018 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 21:05:07,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:07,212 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:07,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:07,213 INFO L85 PathProgramCache]: Analyzing trace with hash -412916885, now seen corresponding path program 12 times [2025-02-07 21:05:07,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:07,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796062258] [2025-02-07 21:05:07,213 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:07,221 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 459 statements into 32 equivalence classes. [2025-02-07 21:05:07,265 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) and asserted 459 of 459 statements. [2025-02-07 21:05:07,265 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2025-02-07 21:05:07,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-02-07 21:05:11,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:11,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796062258] [2025-02-07 21:05:11,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796062258] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:11,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037765824] [2025-02-07 21:05:11,257 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:05:11,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:11,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:11,260 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 21:05:11,261 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 21:05:11,410 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 459 statements into 32 equivalence classes. [2025-02-07 21:05:11,531 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) and asserted 459 of 459 statements. [2025-02-07 21:05:11,531 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2025-02-07 21:05:11,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:11,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 271 conjuncts are in the unsatisfiable core [2025-02-07 21:05:11,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-02-07 21:05:11,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-02-07 21:05:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037765824] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:13,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:13,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 52 [2025-02-07 21:05:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690097389] [2025-02-07 21:05:13,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:13,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-07 21:05:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:13,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-07 21:05:13,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 21:05:13,877 INFO L87 Difference]: Start difference. First operand 174 states and 256 transitions. Second operand has 52 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 27 states have internal predecessors, (62), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) [2025-02-07 21:05:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:14,435 INFO L93 Difference]: Finished difference Result 246 states and 431 transitions. [2025-02-07 21:05:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 21:05:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 27 states have internal predecessors, (62), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) Word has length 459 [2025-02-07 21:05:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:14,438 INFO L225 Difference]: With dead ends: 246 [2025-02-07 21:05:14,438 INFO L226 Difference]: Without dead ends: 242 [2025-02-07 21:05:14,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 21:05:14,441 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 3001 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:14,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3088 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 21:05:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2025-02-07 21:05:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 217. [2025-02-07 21:05:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.1013513513513513) internal successors, (163), 144 states have internal predecessors, (163), 41 states have call successors, (41), 24 states have call predecessors, (41), 27 states have return successors, (173), 48 states have call predecessors, (173), 41 states have call successors, (173) [2025-02-07 21:05:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 377 transitions. [2025-02-07 21:05:14,494 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 377 transitions. Word has length 459 [2025-02-07 21:05:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:14,494 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 377 transitions. [2025-02-07 21:05:14,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 27 states have internal predecessors, (62), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) [2025-02-07 21:05:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 377 transitions. [2025-02-07 21:05:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2025-02-07 21:05:14,497 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:14,497 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 32, 31, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 12, 7, 7, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:14,508 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 21:05:14,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:14,702 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:14,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash -520482714, now seen corresponding path program 13 times [2025-02-07 21:05:14,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:14,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077234803] [2025-02-07 21:05:14,702 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:14,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:14,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 528 statements into 1 equivalence classes. [2025-02-07 21:05:14,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 528 of 528 statements. [2025-02-07 21:05:14,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:14,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8105 backedges. 834 proven. 394 refuted. 0 times theorem prover too weak. 6877 trivial. 0 not checked. [2025-02-07 21:05:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077234803] [2025-02-07 21:05:15,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077234803] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236931572] [2025-02-07 21:05:15,056 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:05:15,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:15,064 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 21:05:15,065 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 21:05:15,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 528 statements into 1 equivalence classes. [2025-02-07 21:05:15,300 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 528 of 528 statements. [2025-02-07 21:05:15,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:05:15,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:15,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-07 21:05:15,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8105 backedges. 1023 proven. 511 refuted. 0 times theorem prover too weak. 6571 trivial. 0 not checked. [2025-02-07 21:05:15,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8105 backedges. 1023 proven. 541 refuted. 0 times theorem prover too weak. 6541 trivial. 0 not checked. [2025-02-07 21:05:17,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236931572] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:17,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:17,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 25 [2025-02-07 21:05:17,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584711652] [2025-02-07 21:05:17,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:17,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 21:05:17,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:17,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 21:05:17,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2025-02-07 21:05:17,750 INFO L87 Difference]: Start difference. First operand 217 states and 377 transitions. Second operand has 25 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 25 states have internal predecessors, (80), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-07 21:05:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:17,955 INFO L93 Difference]: Finished difference Result 227 states and 393 transitions. [2025-02-07 21:05:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 21:05:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 25 states have internal predecessors, (80), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) Word has length 528 [2025-02-07 21:05:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:17,958 INFO L225 Difference]: With dead ends: 227 [2025-02-07 21:05:17,958 INFO L226 Difference]: Without dead ends: 223 [2025-02-07 21:05:17,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1039 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 21:05:17,959 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:17,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 391 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-02-07 21:05:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 217. [2025-02-07 21:05:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.1013513513513513) internal successors, (163), 144 states have internal predecessors, (163), 41 states have call successors, (41), 24 states have call predecessors, (41), 27 states have return successors, (173), 48 states have call predecessors, (173), 41 states have call successors, (173) [2025-02-07 21:05:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 377 transitions. [2025-02-07 21:05:17,973 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 377 transitions. Word has length 528 [2025-02-07 21:05:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:17,974 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 377 transitions. [2025-02-07 21:05:17,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 25 states have internal predecessors, (80), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-07 21:05:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 377 transitions. [2025-02-07 21:05:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2025-02-07 21:05:17,976 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:17,976 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 27, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:17,987 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 21:05:18,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:18,177 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:18,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1074665245, now seen corresponding path program 14 times [2025-02-07 21:05:18,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513027749] [2025-02-07 21:05:18,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:18,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:18,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 420 statements into 2 equivalence classes. [2025-02-07 21:05:18,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 420 of 420 statements. [2025-02-07 21:05:18,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:18,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5067 backedges. 343 proven. 413 refuted. 0 times theorem prover too weak. 4311 trivial. 0 not checked. [2025-02-07 21:05:18,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:18,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513027749] [2025-02-07 21:05:18,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513027749] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:18,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257851554] [2025-02-07 21:05:18,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:05:18,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:18,384 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 21:05:18,385 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 21:05:18,547 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 420 statements into 2 equivalence classes. [2025-02-07 21:05:18,612 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 420 of 420 statements. [2025-02-07 21:05:18,612 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:05:18,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:18,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 21:05:18,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5067 backedges. 226 proven. 823 refuted. 0 times theorem prover too weak. 4018 trivial. 0 not checked. [2025-02-07 21:05:18,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5067 backedges. 234 proven. 836 refuted. 0 times theorem prover too weak. 3997 trivial. 0 not checked. [2025-02-07 21:05:20,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257851554] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:20,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:20,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 17] total 27 [2025-02-07 21:05:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479886305] [2025-02-07 21:05:20,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:20,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-07 21:05:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:20,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-07 21:05:20,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2025-02-07 21:05:20,384 INFO L87 Difference]: Start difference. First operand 217 states and 377 transitions. Second operand has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 19 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (33), 17 states have call predecessors, (33), 19 states have call successors, (33) [2025-02-07 21:05:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:20,977 INFO L93 Difference]: Finished difference Result 578 states and 1220 transitions. [2025-02-07 21:05:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-07 21:05:20,977 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 19 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (33), 17 states have call predecessors, (33), 19 states have call successors, (33) Word has length 420 [2025-02-07 21:05:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:20,980 INFO L225 Difference]: With dead ends: 578 [2025-02-07 21:05:20,980 INFO L226 Difference]: Without dead ends: 223 [2025-02-07 21:05:20,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 818 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=2453, Unknown=0, NotChecked=0, Total=2862 [2025-02-07 21:05:20,986 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 114 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:20,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 524 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 21:05:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-02-07 21:05:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 199. [2025-02-07 21:05:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 132 states have internal predecessors, (152), 37 states have call successors, (37), 24 states have call predecessors, (37), 24 states have return successors, (71), 42 states have call predecessors, (71), 37 states have call successors, (71) [2025-02-07 21:05:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 260 transitions. [2025-02-07 21:05:21,003 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 260 transitions. Word has length 420 [2025-02-07 21:05:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:21,004 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 260 transitions. [2025-02-07 21:05:21,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 19 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (33), 17 states have call predecessors, (33), 19 states have call successors, (33) [2025-02-07 21:05:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 260 transitions. [2025-02-07 21:05:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2025-02-07 21:05:21,007 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:21,007 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 30, 29, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 11, 7, 7, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:21,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 21:05:21,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:21,211 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:21,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1495704066, now seen corresponding path program 15 times [2025-02-07 21:05:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968322097] [2025-02-07 21:05:21,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:21,221 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 500 statements into 32 equivalence classes. [2025-02-07 21:05:21,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) and asserted 429 of 500 statements. [2025-02-07 21:05:21,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2025-02-07 21:05:21,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 401 proven. 693 refuted. 0 times theorem prover too weak. 6155 trivial. 0 not checked. [2025-02-07 21:05:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968322097] [2025-02-07 21:05:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968322097] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666538976] [2025-02-07 21:05:21,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:05:21,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:21,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:21,472 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 21:05:21,474 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 21:05:21,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 500 statements into 32 equivalence classes. [2025-02-07 21:05:21,737 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) and asserted 429 of 500 statements. [2025-02-07 21:05:21,738 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2025-02-07 21:05:21,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:21,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 21:05:21,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 401 proven. 693 refuted. 0 times theorem prover too weak. 6155 trivial. 0 not checked. [2025-02-07 21:05:21,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7249 backedges. 407 proven. 703 refuted. 0 times theorem prover too weak. 6139 trivial. 0 not checked. [2025-02-07 21:05:23,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666538976] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:23,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:23,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 17 [2025-02-07 21:05:23,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987971750] [2025-02-07 21:05:23,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:23,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-07 21:05:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:23,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-07 21:05:23,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-02-07 21:05:23,252 INFO L87 Difference]: Start difference. First operand 199 states and 260 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 12 states have call predecessors, (22), 11 states have call successors, (22) [2025-02-07 21:05:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:23,397 INFO L93 Difference]: Finished difference Result 216 states and 280 transitions. [2025-02-07 21:05:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 21:05:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 12 states have call predecessors, (22), 11 states have call successors, (22) Word has length 500 [2025-02-07 21:05:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:23,400 INFO L225 Difference]: With dead ends: 216 [2025-02-07 21:05:23,400 INFO L226 Difference]: Without dead ends: 199 [2025-02-07 21:05:23,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 991 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2025-02-07 21:05:23,401 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:23,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 290 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:05:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2025-02-07 21:05:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2025-02-07 21:05:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 128 states have (on average 1.09375) internal successors, (140), 124 states have internal predecessors, (140), 35 states have call successors, (35), 21 states have call predecessors, (35), 24 states have return successors, (60), 42 states have call predecessors, (60), 35 states have call successors, (60) [2025-02-07 21:05:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2025-02-07 21:05:23,413 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 500 [2025-02-07 21:05:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:23,413 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2025-02-07 21:05:23,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 12 states have call predecessors, (22), 11 states have call successors, (22) [2025-02-07 21:05:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2025-02-07 21:05:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2025-02-07 21:05:23,415 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:05:23,415 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 32, 30, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 13, 8, 3, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:23,426 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 21:05:23,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-07 21:05:23,616 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:05:23,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:05:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1539473400, now seen corresponding path program 16 times [2025-02-07 21:05:23,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:05:23,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817820898] [2025-02-07 21:05:23,617 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:23,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:05:23,628 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 503 statements into 2 equivalence classes. [2025-02-07 21:05:23,684 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 428 of 503 statements. [2025-02-07 21:05:23,685 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:05:23,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7351 backedges. 798 proven. 1275 refuted. 0 times theorem prover too weak. 5278 trivial. 0 not checked. [2025-02-07 21:05:24,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:05:24,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817820898] [2025-02-07 21:05:24,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817820898] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:05:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400296724] [2025-02-07 21:05:24,326 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:05:24,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:05:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:05:24,328 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 21:05:24,329 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 21:05:24,512 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 503 statements into 2 equivalence classes. [2025-02-07 21:05:24,606 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 428 of 503 statements. [2025-02-07 21:05:24,607 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 21:05:24,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:05:24,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 21:05:24,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:05:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7351 backedges. 4090 proven. 612 refuted. 0 times theorem prover too weak. 2649 trivial. 0 not checked. [2025-02-07 21:05:24,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:05:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7351 backedges. 512 proven. 1633 refuted. 0 times theorem prover too weak. 5206 trivial. 0 not checked. [2025-02-07 21:05:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400296724] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:05:27,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:05:27,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 25] total 38 [2025-02-07 21:05:27,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397763463] [2025-02-07 21:05:27,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:05:27,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-07 21:05:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:05:27,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-07 21:05:27,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 21:05:27,389 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 28 states have call successors, (39), 2 states have call predecessors, (39), 18 states have return successors, (51), 21 states have call predecessors, (51), 28 states have call successors, (51) [2025-02-07 21:05:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:05:28,466 INFO L93 Difference]: Finished difference Result 351 states and 491 transitions. [2025-02-07 21:05:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 21:05:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 28 states have call successors, (39), 2 states have call predecessors, (39), 18 states have return successors, (51), 21 states have call predecessors, (51), 28 states have call successors, (51) Word has length 503 [2025-02-07 21:05:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:05:28,468 INFO L225 Difference]: With dead ends: 351 [2025-02-07 21:05:28,468 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 21:05:28,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 983 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=708, Invalid=4262, Unknown=0, NotChecked=0, Total=4970 [2025-02-07 21:05:28,476 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 163 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:05:28,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 581 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 21:05:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 21:05:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 21:05:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 21:05:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 21:05:28,483 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 503 [2025-02-07 21:05:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:05:28,484 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 21:05:28,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 28 states have call successors, (39), 2 states have call predecessors, (39), 18 states have return successors, (51), 21 states have call predecessors, (51), 28 states have call successors, (51) [2025-02-07 21:05:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 21:05:28,484 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 21:05:28,487 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 21:05:28,495 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 21:05:28,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 21:05:28,695 INFO L422 BasicCegarLoop]: Path program histogram: [16, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:05:28,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.