./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.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/MultCommutative-2.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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:01:52,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:01:52,789 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:01:52,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:01:52,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:01:52,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:01:52,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:01:52,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:01:52,812 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:01:52,812 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:01:52,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:01:52,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:01:52,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:01:52,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:01:52,814 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:01:52,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:01:52,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:01:52,814 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:01:52,815 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:01:52,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:01:52,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:01:52,816 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:01:52,817 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:01:52,817 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:01:52,817 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 -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2025-02-07 21:01:53,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:01:53,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:01:53,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:01:53,029 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:01:53,029 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:01:53,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2025-02-07 21:01:54,158 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ab77a5cfd/0fd1a46349fa44ada79e92f73c22e0bd/FLAG8a894fe4c [2025-02-07 21:01:54,394 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:01:54,395 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2025-02-07 21:01:54,407 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ab77a5cfd/0fd1a46349fa44ada79e92f73c22e0bd/FLAG8a894fe4c [2025-02-07 21:01:54,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ab77a5cfd/0fd1a46349fa44ada79e92f73c22e0bd [2025-02-07 21:01:54,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:01:54,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:01:54,454 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:01:54,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:01:54,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:01:54,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e8bc1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54, skipping insertion in model container [2025-02-07 21:01:54,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,471 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:01:54,572 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/MultCommutative-2.c[970,983] [2025-02-07 21:01:54,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:01:54,584 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:01:54,595 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/MultCommutative-2.c[970,983] [2025-02-07 21:01:54,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:01:54,608 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:01:54,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54 WrapperNode [2025-02-07 21:01:54,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:01:54,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:01:54,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:01:54,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:01:54,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,629 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2025-02-07 21:01:54,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:01:54,631 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:01:54,631 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:01:54,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:01:54,636 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,637 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,647 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 21:01:54,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,653 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:01:54,658 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:01:54,658 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:01:54,658 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:01:54,659 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (1/1) ... [2025-02-07 21:01:54,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:01:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:01:54,684 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 21:01:54,689 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 21:01:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:01:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2025-02-07 21:01:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2025-02-07 21:01:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:01:54,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:01:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:01:54,757 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:01:54,759 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:01:54,822 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret5; [2025-02-07 21:01:54,823 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L19: havoc #t~ret4; [2025-02-07 21:01:54,875 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-02-07 21:01:54,875 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:01:54,882 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:01:54,883 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:01:54,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:01:54 BoogieIcfgContainer [2025-02-07 21:01:54,883 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:01:54,885 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:01:54,885 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:01:54,888 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:01:54,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:01:54" (1/3) ... [2025-02-07 21:01:54,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767091bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:01:54, skipping insertion in model container [2025-02-07 21:01:54,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:01:54" (2/3) ... [2025-02-07 21:01:54,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767091bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:01:54, skipping insertion in model container [2025-02-07 21:01:54,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:01:54" (3/3) ... [2025-02-07 21:01:54,891 INFO L128 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2025-02-07 21:01:54,901 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:01:54,902 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG MultCommutative-2.c that has 2 procedures, 22 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:01:54,937 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:01:54,947 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;@1e0d5d63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:01:54,948 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:01:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 21:01:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 21:01:54,954 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:54,955 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:54,955 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:54,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1443513844, now seen corresponding path program 1 times [2025-02-07 21:01:54,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401303899] [2025-02-07 21:01:54,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:01:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:55,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 21:01:55,030 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 21:01:55,030 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:01:55,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-07 21:01:55,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:55,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401303899] [2025-02-07 21:01:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401303899] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:01:55,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:01:55,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-07 21:01:55,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072735126] [2025-02-07 21:01:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:01:55,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 21:01:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:55,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 21:01:55,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-07 21:01:55,202 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 21:01:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:01:55,269 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2025-02-07 21:01:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 21:01:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-02-07 21:01:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:01:55,275 INFO L225 Difference]: With dead ends: 32 [2025-02-07 21:01:55,275 INFO L226 Difference]: Without dead ends: 25 [2025-02-07 21:01:55,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-02-07 21:01:55,278 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:01:55,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 124 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:01:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-07 21:01:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2025-02-07 21:01:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 21:01:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2025-02-07 21:01:55,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 19 [2025-02-07 21:01:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:01:55,302 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2025-02-07 21:01:55,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 21:01:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2025-02-07 21:01:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 21:01:55,304 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:55,304 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:55,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 21:01:55,304 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:55,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1234362666, now seen corresponding path program 1 times [2025-02-07 21:01:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159167503] [2025-02-07 21:01:55,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:01:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:55,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 21:01:55,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 21:01:55,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:01:55,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-02-07 21:01:55,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:55,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159167503] [2025-02-07 21:01:55,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159167503] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:01:55,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:01:55,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-07 21:01:55,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366949603] [2025-02-07 21:01:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:01:55,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 21:01:55,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:55,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 21:01:55,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-07 21:01:55,424 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:01:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:01:55,484 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2025-02-07 21:01:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:01:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-02-07 21:01:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:01:55,485 INFO L225 Difference]: With dead ends: 34 [2025-02-07 21:01:55,485 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 21:01:55,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:01:55,486 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:01:55,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:01:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 21:01:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2025-02-07 21:01:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 21:01:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2025-02-07 21:01:55,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 25 [2025-02-07 21:01:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:01:55,493 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2025-02-07 21:01:55,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:01:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2025-02-07 21:01:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 21:01:55,494 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:55,494 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:55,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 21:01:55,494 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:55,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash -672803696, now seen corresponding path program 1 times [2025-02-07 21:01:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:55,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116585054] [2025-02-07 21:01:55,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:01:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:55,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-07 21:01:55,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 21:01:55,507 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:01:55,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:01:55,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116585054] [2025-02-07 21:01:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116585054] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:01:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831472751] [2025-02-07 21:01:55,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:01:55,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:01:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:01:55,558 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 21:01:55,560 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 21:01:55,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-07 21:01:55,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 21:01:55,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:01:55,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:55,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 21:01:55,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:01:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:01:55,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:01:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:01:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831472751] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:01:55,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:01:55,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-02-07 21:01:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589657155] [2025-02-07 21:01:55,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:01:55,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 21:01:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:55,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 21:01:55,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 21:01:55,753 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:01:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:01:55,821 INFO L93 Difference]: Finished difference Result 34 states and 52 transitions. [2025-02-07 21:01:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 21:01:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2025-02-07 21:01:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:01:55,822 INFO L225 Difference]: With dead ends: 34 [2025-02-07 21:01:55,822 INFO L226 Difference]: Without dead ends: 26 [2025-02-07 21:01:55,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-02-07 21:01:55,823 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:01:55,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:01:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-02-07 21:01:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2025-02-07 21:01:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-02-07 21:01:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2025-02-07 21:01:55,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 26 [2025-02-07 21:01:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:01:55,827 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2025-02-07 21:01:55,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 21:01:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2025-02-07 21:01:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 21:01:55,828 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:55,828 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:55,841 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 21:01:56,028 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 21:01:56,029 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:56,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:56,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1579795314, now seen corresponding path program 2 times [2025-02-07 21:01:56,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:56,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48542352] [2025-02-07 21:01:56,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:01:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:56,034 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-07 21:01:56,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 21:01:56,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:01:56,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-07 21:01:56,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:56,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48542352] [2025-02-07 21:01:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48542352] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:01:56,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:01:56,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 21:01:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890182853] [2025-02-07 21:01:56,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:01:56,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 21:01:56,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:56,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 21:01:56,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:01:56,097 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-07 21:01:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:01:56,127 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2025-02-07 21:01:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 21:01:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2025-02-07 21:01:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:01:56,128 INFO L225 Difference]: With dead ends: 28 [2025-02-07 21:01:56,129 INFO L226 Difference]: Without dead ends: 24 [2025-02-07 21:01:56,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 21:01:56,129 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:01:56,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:01:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-07 21:01:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-02-07 21:01:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-07 21:01:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-02-07 21:01:56,133 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2025-02-07 21:01:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:01:56,133 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-02-07 21:01:56,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-02-07 21:01:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-02-07 21:01:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 21:01:56,134 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:56,134 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:56,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-07 21:01:56,134 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:56,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1782523858, now seen corresponding path program 1 times [2025-02-07 21:01:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760424033] [2025-02-07 21:01:56,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:01:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:56,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 21:01:56,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 21:01:56,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:01:56,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 21:01:56,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:56,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760424033] [2025-02-07 21:01:56,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760424033] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:01:56,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815892918] [2025-02-07 21:01:56,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:01:56,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:01:56,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:01:56,186 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 21:01:56,187 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 21:01:56,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 21:01:56,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 21:01:56,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:01:56,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:56,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-07 21:01:56,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:01:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 21:01:56,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:01:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 21:01:56,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815892918] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:01:56,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:01:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-02-07 21:01:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783299963] [2025-02-07 21:01:56,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:01:56,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 21:01:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:56,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 21:01:56,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-07 21:01:56,306 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 21:01:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:01:56,360 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2025-02-07 21:01:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:01:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2025-02-07 21:01:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:01:56,361 INFO L225 Difference]: With dead ends: 35 [2025-02-07 21:01:56,361 INFO L226 Difference]: Without dead ends: 29 [2025-02-07 21:01:56,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:01:56,362 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:01:56,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 50 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 21:01:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-07 21:01:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2025-02-07 21:01:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-07 21:01:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2025-02-07 21:01:56,366 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 39 [2025-02-07 21:01:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:01:56,366 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2025-02-07 21:01:56,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 21:01:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2025-02-07 21:01:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 21:01:56,367 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:56,367 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:56,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 21:01:56,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:01:56,568 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:56,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1605493578, now seen corresponding path program 3 times [2025-02-07 21:01:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:56,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642461604] [2025-02-07 21:01:56,569 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:01:56,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:56,573 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 4 equivalence classes. [2025-02-07 21:01:56,580 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 21:01:56,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:01:56,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-07 21:01:56,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:56,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642461604] [2025-02-07 21:01:56,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642461604] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:01:56,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417941968] [2025-02-07 21:01:56,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:01:56,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:01:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:01:56,906 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 21:01:56,907 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 21:01:56,927 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 4 equivalence classes. [2025-02-07 21:01:56,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 21:01:56,939 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-07 21:01:56,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:56,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-02-07 21:01:56,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:01:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 21:01:57,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:01:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-07 21:01:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417941968] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:01:57,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:01:57,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 35 [2025-02-07 21:01:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223254979] [2025-02-07 21:01:57,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:01:57,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-07 21:01:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:57,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-07 21:01:57,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 21:01:57,842 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 35 states, 32 states have (on average 1.625) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2025-02-07 21:01:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:01:58,243 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2025-02-07 21:01:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 21:01:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.625) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 33 [2025-02-07 21:01:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:01:58,247 INFO L225 Difference]: With dead ends: 40 [2025-02-07 21:01:58,247 INFO L226 Difference]: Without dead ends: 36 [2025-02-07 21:01:58,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2025-02-07 21:01:58,249 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:01:58,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 154 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 21:01:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-07 21:01:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2025-02-07 21:01:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2025-02-07 21:01:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2025-02-07 21:01:58,264 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 33 [2025-02-07 21:01:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:01:58,265 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2025-02-07 21:01:58,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.625) internal successors, (52), 25 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2025-02-07 21:01:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2025-02-07 21:01:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 21:01:58,266 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:01:58,266 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:01:58,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 21:01:58,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:01:58,467 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:01:58,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:01:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1414989126, now seen corresponding path program 4 times [2025-02-07 21:01:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:01:58,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390801345] [2025-02-07 21:01:58,467 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:01:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:01:58,473 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-07 21:01:58,494 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 21:01:58,495 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:01:58,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-07 21:01:59,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:01:59,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390801345] [2025-02-07 21:01:59,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390801345] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:01:59,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462252927] [2025-02-07 21:01:59,048 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:01:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:01:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:01:59,050 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 21:01:59,051 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 21:01:59,072 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-02-07 21:01:59,085 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 21:01:59,085 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:01:59,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:01:59,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-07 21:01:59,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:01:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-07 21:01:59,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:01:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-07 21:01:59,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462252927] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:01:59,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:01:59,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 18] total 40 [2025-02-07 21:01:59,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918707846] [2025-02-07 21:01:59,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:01:59,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-07 21:01:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:01:59,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-07 21:01:59,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 21:01:59,918 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 27 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-07 21:02:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:00,804 INFO L93 Difference]: Finished difference Result 68 states and 110 transitions. [2025-02-07 21:02:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-07 21:02:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 27 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) Word has length 40 [2025-02-07 21:02:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:00,809 INFO L225 Difference]: With dead ends: 68 [2025-02-07 21:02:00,810 INFO L226 Difference]: Without dead ends: 53 [2025-02-07 21:02:00,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=3233, Unknown=0, NotChecked=0, Total=3660 [2025-02-07 21:02:00,818 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:00,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 261 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 21:02:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-07 21:02:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2025-02-07 21:02:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (29), 10 states have call predecessors, (29), 7 states have call successors, (29) [2025-02-07 21:02:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2025-02-07 21:02:00,838 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 40 [2025-02-07 21:02:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:00,839 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2025-02-07 21:02:00,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 27 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (14), 13 states have call predecessors, (14), 9 states have call successors, (14) [2025-02-07 21:02:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2025-02-07 21:02:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-02-07 21:02:00,840 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:00,841 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:00,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 21:02:01,041 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,SelfDestructingSolverStorable6 [2025-02-07 21:02:01,042 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:01,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 301075316, now seen corresponding path program 2 times [2025-02-07 21:02:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:01,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203384953] [2025-02-07 21:02:01,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:02:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:01,046 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 2 equivalence classes. [2025-02-07 21:02:01,051 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 21:02:01,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:02:01,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-02-07 21:02:01,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:01,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203384953] [2025-02-07 21:02:01,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203384953] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:01,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451030303] [2025-02-07 21:02:01,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:02:01,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:01,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:01,110 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 21:02:01,114 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 21:02:01,139 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 2 equivalence classes. [2025-02-07 21:02:01,155 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-02-07 21:02:01,156 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:02:01,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:01,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 21:02:01,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-02-07 21:02:01,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-02-07 21:02:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451030303] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:01,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:01,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2025-02-07 21:02:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153488468] [2025-02-07 21:02:01,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:01,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 21:02:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:01,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 21:02:01,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-02-07 21:02:01,311 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-02-07 21:02:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:01,400 INFO L93 Difference]: Finished difference Result 72 states and 110 transitions. [2025-02-07 21:02:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-07 21:02:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2025-02-07 21:02:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:01,401 INFO L225 Difference]: With dead ends: 72 [2025-02-07 21:02:01,401 INFO L226 Difference]: Without dead ends: 25 [2025-02-07 21:02:01,403 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2025-02-07 21:02:01,403 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:01,404 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:02:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-07 21:02:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-07 21:02:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-07 21:02:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-02-07 21:02:01,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 60 [2025-02-07 21:02:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:01,409 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-02-07 21:02:01,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-02-07 21:02:01,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-02-07 21:02:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 21:02:01,410 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:01,410 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:01,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-07 21:02:01,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:01,611 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:01,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:01,612 INFO L85 PathProgramCache]: Analyzing trace with hash 286590800, now seen corresponding path program 5 times [2025-02-07 21:02:01,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:01,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580995216] [2025-02-07 21:02:01,612 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:02:01,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:01,617 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 8 equivalence classes. [2025-02-07 21:02:01,626 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 21:02:01,626 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:02:01,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 79 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-07 21:02:02,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580995216] [2025-02-07 21:02:02,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580995216] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101460322] [2025-02-07 21:02:02,156 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:02:02,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:02,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:02,158 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 21:02:02,160 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 21:02:02,181 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 8 equivalence classes. [2025-02-07 21:02:02,196 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 21:02:02,197 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-07 21:02:02,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:02,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjuncts are in the unsatisfiable core [2025-02-07 21:02:02,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-02-07 21:02:02,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-07 21:02:03,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101460322] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:03,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:03,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 24] total 56 [2025-02-07 21:02:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569188060] [2025-02-07 21:02:03,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:03,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-02-07 21:02:03,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:03,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-02-07 21:02:03,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2861, Unknown=0, NotChecked=0, Total=3080 [2025-02-07 21:02:03,527 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 56 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 38 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) [2025-02-07 21:02:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:04,382 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2025-02-07 21:02:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-07 21:02:04,383 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 38 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) Word has length 54 [2025-02-07 21:02:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:04,383 INFO L225 Difference]: With dead ends: 50 [2025-02-07 21:02:04,383 INFO L226 Difference]: Without dead ends: 39 [2025-02-07 21:02:04,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=644, Invalid=5676, Unknown=0, NotChecked=0, Total=6320 [2025-02-07 21:02:04,386 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:04,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 220 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 21:02:04,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-07 21:02:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2025-02-07 21:02:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2025-02-07 21:02:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2025-02-07 21:02:04,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 54 [2025-02-07 21:02:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:04,408 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2025-02-07 21:02:04,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 38 states have internal predecessors, (74), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) [2025-02-07 21:02:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2025-02-07 21:02:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-07 21:02:04,409 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:04,409 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:04,415 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 21:02:04,609 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,SelfDestructingSolverStorable8 [2025-02-07 21:02:04,610 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:04,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2126109194, now seen corresponding path program 6 times [2025-02-07 21:02:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150123464] [2025-02-07 21:02:04,611 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:02:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:04,615 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 10 equivalence classes. [2025-02-07 21:02:04,626 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 21:02:04,626 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-02-07 21:02:04,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 3 proven. 143 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-02-07 21:02:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150123464] [2025-02-07 21:02:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150123464] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344172821] [2025-02-07 21:02:05,284 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:02:05,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:05,286 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 21:02:05,287 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 21:02:05,316 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 68 statements into 10 equivalence classes. [2025-02-07 21:02:05,337 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 21:02:05,337 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-02-07 21:02:05,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:05,339 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjuncts are in the unsatisfiable core [2025-02-07 21:02:05,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-02-07 21:02:05,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 29 proven. 153 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-07 21:02:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344172821] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:06,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:06,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 30] total 49 [2025-02-07 21:02:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330467595] [2025-02-07 21:02:06,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:06,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 21:02:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:06,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 21:02:06,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2176, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 21:02:06,741 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 49 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 32 states have internal predecessors, (70), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (23), 17 states have call predecessors, (23), 14 states have call successors, (23) [2025-02-07 21:02:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:07,799 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2025-02-07 21:02:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-07 21:02:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 32 states have internal predecessors, (70), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (23), 17 states have call predecessors, (23), 14 states have call successors, (23) Word has length 68 [2025-02-07 21:02:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:07,801 INFO L225 Difference]: With dead ends: 60 [2025-02-07 21:02:07,801 INFO L226 Difference]: Without dead ends: 48 [2025-02-07 21:02:07,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=673, Invalid=5179, Unknown=0, NotChecked=0, Total=5852 [2025-02-07 21:02:07,803 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:07,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 299 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 21:02:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-07 21:02:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2025-02-07 21:02:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2025-02-07 21:02:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2025-02-07 21:02:07,813 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 68 [2025-02-07 21:02:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:07,813 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2025-02-07 21:02:07,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 32 states have internal predecessors, (70), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (23), 17 states have call predecessors, (23), 14 states have call successors, (23) [2025-02-07 21:02:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2025-02-07 21:02:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-07 21:02:07,814 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:07,814 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:07,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-07 21:02:08,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:08,015 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:08,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash 548326564, now seen corresponding path program 7 times [2025-02-07 21:02:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192040827] [2025-02-07 21:02:08,016 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:02:08,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:08,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-02-07 21:02:08,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:02:08,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:02:08,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-02-07 21:02:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:09,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192040827] [2025-02-07 21:02:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192040827] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:09,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095306404] [2025-02-07 21:02:09,021 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:02:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:09,023 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 21:02:09,024 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 21:02:09,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-02-07 21:02:09,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:02:09,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:02:09,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:09,070 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-02-07 21:02:09,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-02-07 21:02:09,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-02-07 21:02:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095306404] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:11,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:11,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 22, 33] total 78 [2025-02-07 21:02:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522036063] [2025-02-07 21:02:11,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:11,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2025-02-07 21:02:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:11,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2025-02-07 21:02:11,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5739, Unknown=0, NotChecked=0, Total=6006 [2025-02-07 21:02:11,474 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 78 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 51 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (28), 27 states have call predecessors, (28), 21 states have call successors, (28) [2025-02-07 21:02:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:12,954 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2025-02-07 21:02:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-07 21:02:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 51 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (28), 27 states have call predecessors, (28), 21 states have call successors, (28) Word has length 75 [2025-02-07 21:02:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:12,956 INFO L225 Difference]: With dead ends: 64 [2025-02-07 21:02:12,956 INFO L226 Difference]: Without dead ends: 54 [2025-02-07 21:02:12,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=947, Invalid=10609, Unknown=0, NotChecked=0, Total=11556 [2025-02-07 21:02:12,959 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:12,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 582 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 21:02:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-07 21:02:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2025-02-07 21:02:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (25), 11 states have call predecessors, (25), 7 states have call successors, (25) [2025-02-07 21:02:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2025-02-07 21:02:12,972 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 75 [2025-02-07 21:02:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:12,973 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2025-02-07 21:02:12,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 51 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (28), 27 states have call predecessors, (28), 21 states have call successors, (28) [2025-02-07 21:02:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2025-02-07 21:02:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 21:02:12,974 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:12,974 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:12,980 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 21:02:13,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:13,179 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:13,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1555993216, now seen corresponding path program 8 times [2025-02-07 21:02:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891439071] [2025-02-07 21:02:13,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:02:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:13,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-02-07 21:02:13,188 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 21:02:13,188 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:02:13,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-02-07 21:02:13,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891439071] [2025-02-07 21:02:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891439071] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948102790] [2025-02-07 21:02:13,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:02:13,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:13,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:13,606 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 21:02:13,607 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 21:02:13,641 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-02-07 21:02:13,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 21:02:13,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:02:13,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:13,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-07 21:02:13,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-07 21:02:14,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 21:02:15,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948102790] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:15,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:15,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 26] total 60 [2025-02-07 21:02:15,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967850881] [2025-02-07 21:02:15,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:15,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-02-07 21:02:15,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:15,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-02-07 21:02:15,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3312, Unknown=0, NotChecked=0, Total=3540 [2025-02-07 21:02:15,081 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 60 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 40 states have internal predecessors, (92), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (21), 20 states have call predecessors, (21), 16 states have call successors, (21) [2025-02-07 21:02:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:15,920 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2025-02-07 21:02:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-07 21:02:15,920 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 40 states have internal predecessors, (92), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (21), 20 states have call predecessors, (21), 16 states have call successors, (21) Word has length 54 [2025-02-07 21:02:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:15,921 INFO L225 Difference]: With dead ends: 70 [2025-02-07 21:02:15,921 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 21:02:15,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=704, Invalid=6102, Unknown=0, NotChecked=0, Total=6806 [2025-02-07 21:02:15,923 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:15,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 280 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-07 21:02:15,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 21:02:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2025-02-07 21:02:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (24), 11 states have call predecessors, (24), 7 states have call successors, (24) [2025-02-07 21:02:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2025-02-07 21:02:15,936 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 54 [2025-02-07 21:02:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:15,936 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2025-02-07 21:02:15,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 40 states have internal predecessors, (92), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (21), 20 states have call predecessors, (21), 16 states have call successors, (21) [2025-02-07 21:02:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2025-02-07 21:02:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-02-07 21:02:15,937 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:15,937 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:15,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 21:02:16,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:16,138 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:16,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 976926432, now seen corresponding path program 9 times [2025-02-07 21:02:16,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:16,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437751661] [2025-02-07 21:02:16,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:02:16,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:16,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 82 statements into 13 equivalence classes. [2025-02-07 21:02:16,155 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 82 of 82 statements. [2025-02-07 21:02:16,155 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-02-07 21:02:16,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 21 proven. 151 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2025-02-07 21:02:16,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437751661] [2025-02-07 21:02:16,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437751661] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680960044] [2025-02-07 21:02:16,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:02:16,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:16,880 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 21:02:16,882 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 21:02:16,913 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 82 statements into 13 equivalence classes. [2025-02-07 21:02:16,935 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) and asserted 82 of 82 statements. [2025-02-07 21:02:16,936 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2025-02-07 21:02:16,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:16,938 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-02-07 21:02:16,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2025-02-07 21:02:17,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-02-07 21:02:18,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680960044] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:18,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:18,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 36] total 61 [2025-02-07 21:02:18,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632568075] [2025-02-07 21:02:18,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:18,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-02-07 21:02:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:18,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-02-07 21:02:18,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2025-02-07 21:02:18,934 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 61 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 39 states have internal predecessors, (87), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (25), 22 states have call predecessors, (25), 15 states have call successors, (25) [2025-02-07 21:02:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:19,977 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2025-02-07 21:02:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-07 21:02:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 39 states have internal predecessors, (87), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (25), 22 states have call predecessors, (25), 15 states have call successors, (25) Word has length 82 [2025-02-07 21:02:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:19,978 INFO L225 Difference]: With dead ends: 64 [2025-02-07 21:02:19,978 INFO L226 Difference]: Without dead ends: 48 [2025-02-07 21:02:19,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 129 SyntacticMatches, 15 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=836, Invalid=7354, Unknown=0, NotChecked=0, Total=8190 [2025-02-07 21:02:19,979 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:19,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 387 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-07 21:02:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-02-07 21:02:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2025-02-07 21:02:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (22), 11 states have call predecessors, (22), 5 states have call successors, (22) [2025-02-07 21:02:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2025-02-07 21:02:19,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 82 [2025-02-07 21:02:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:19,988 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2025-02-07 21:02:19,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 39 states have internal predecessors, (87), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (25), 22 states have call predecessors, (25), 15 states have call successors, (25) [2025-02-07 21:02:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2025-02-07 21:02:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-07 21:02:19,989 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:19,989 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:19,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-07 21:02:20,189 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,SelfDestructingSolverStorable12 [2025-02-07 21:02:20,189 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:20,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1327785906, now seen corresponding path program 10 times [2025-02-07 21:02:20,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:20,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441903559] [2025-02-07 21:02:20,190 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:02:20,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:20,193 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 75 statements into 2 equivalence classes. [2025-02-07 21:02:20,198 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:02:20,198 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:02:20,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 39 proven. 162 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-02-07 21:02:20,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441903559] [2025-02-07 21:02:20,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441903559] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999032913] [2025-02-07 21:02:20,957 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:02:20,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:20,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:20,959 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 21:02:20,961 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 21:02:21,003 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 75 statements into 2 equivalence classes. [2025-02-07 21:02:21,021 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-07 21:02:21,022 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:02:21,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:21,023 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-02-07 21:02:21,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2025-02-07 21:02:21,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 32 proven. 200 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-02-07 21:02:23,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999032913] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:23,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:23,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20, 33] total 65 [2025-02-07 21:02:23,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947582917] [2025-02-07 21:02:23,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:23,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-02-07 21:02:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:23,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-02-07 21:02:23,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3912, Unknown=0, NotChecked=0, Total=4160 [2025-02-07 21:02:23,007 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 65 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 41 states have internal predecessors, (87), 14 states have call successors, (14), 1 states have call predecessors, (14), 17 states have return successors, (26), 24 states have call predecessors, (26), 14 states have call successors, (26) [2025-02-07 21:02:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:24,164 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2025-02-07 21:02:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-07 21:02:24,165 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 41 states have internal predecessors, (87), 14 states have call successors, (14), 1 states have call predecessors, (14), 17 states have return successors, (26), 24 states have call predecessors, (26), 14 states have call successors, (26) Word has length 75 [2025-02-07 21:02:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:24,165 INFO L225 Difference]: With dead ends: 62 [2025-02-07 21:02:24,165 INFO L226 Difference]: Without dead ends: 55 [2025-02-07 21:02:24,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=668, Invalid=6988, Unknown=0, NotChecked=0, Total=7656 [2025-02-07 21:02:24,167 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:24,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 440 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 21:02:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-07 21:02:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2025-02-07 21:02:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (19), 11 states have call predecessors, (19), 5 states have call successors, (19) [2025-02-07 21:02:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2025-02-07 21:02:24,172 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 75 [2025-02-07 21:02:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:24,173 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2025-02-07 21:02:24,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 41 states have internal predecessors, (87), 14 states have call successors, (14), 1 states have call predecessors, (14), 17 states have return successors, (26), 24 states have call predecessors, (26), 14 states have call successors, (26) [2025-02-07 21:02:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2025-02-07 21:02:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-02-07 21:02:24,173 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:24,174 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:24,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 21:02:24,374 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,SelfDestructingSolverStorable13 [2025-02-07 21:02:24,374 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:24,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2011069278, now seen corresponding path program 11 times [2025-02-07 21:02:24,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:24,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897938791] [2025-02-07 21:02:24,375 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:02:24,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:24,379 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 110 statements into 18 equivalence classes. [2025-02-07 21:02:24,391 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 110 of 110 statements. [2025-02-07 21:02:24,391 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-02-07 21:02:24,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 109 proven. 383 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-02-07 21:02:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897938791] [2025-02-07 21:02:25,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897938791] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028099134] [2025-02-07 21:02:25,980 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:02:25,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:25,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:25,983 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 21:02:25,984 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 21:02:26,020 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 110 statements into 18 equivalence classes. [2025-02-07 21:02:26,050 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) and asserted 110 of 110 statements. [2025-02-07 21:02:26,050 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2025-02-07 21:02:26,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:26,053 WARN L254 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 181 conjuncts are in the unsatisfiable core [2025-02-07 21:02:26,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 316 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-02-07 21:02:27,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 53 proven. 520 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-02-07 21:02:30,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028099134] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:30,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:30,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 26, 48] total 102 [2025-02-07 21:02:30,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049303901] [2025-02-07 21:02:30,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:30,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-02-07 21:02:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:30,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-02-07 21:02:30,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=9885, Unknown=0, NotChecked=0, Total=10302 [2025-02-07 21:02:30,516 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 102 states, 97 states have (on average 1.4845360824742269) internal successors, (144), 63 states have internal predecessors, (144), 23 states have call successors, (23), 1 states have call predecessors, (23), 28 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) [2025-02-07 21:02:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:32,695 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2025-02-07 21:02:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-02-07 21:02:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 97 states have (on average 1.4845360824742269) internal successors, (144), 63 states have internal predecessors, (144), 23 states have call successors, (23), 1 states have call predecessors, (23), 28 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) Word has length 110 [2025-02-07 21:02:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:32,697 INFO L225 Difference]: With dead ends: 72 [2025-02-07 21:02:32,697 INFO L226 Difference]: Without dead ends: 58 [2025-02-07 21:02:32,701 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4304 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1494, Invalid=17412, Unknown=0, NotChecked=0, Total=18906 [2025-02-07 21:02:32,701 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:32,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 798 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-07 21:02:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-07 21:02:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2025-02-07 21:02:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 10 states have return successors, (21), 12 states have call predecessors, (21), 5 states have call successors, (21) [2025-02-07 21:02:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2025-02-07 21:02:32,710 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 110 [2025-02-07 21:02:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:32,710 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2025-02-07 21:02:32,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 97 states have (on average 1.4845360824742269) internal successors, (144), 63 states have internal predecessors, (144), 23 states have call successors, (23), 1 states have call predecessors, (23), 28 states have return successors, (40), 39 states have call predecessors, (40), 23 states have call successors, (40) [2025-02-07 21:02:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2025-02-07 21:02:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-02-07 21:02:32,711 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:32,711 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:32,718 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 21:02:32,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:32,912 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:32,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 150475486, now seen corresponding path program 12 times [2025-02-07 21:02:32,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:32,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635428122] [2025-02-07 21:02:32,913 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:02:32,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:32,919 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 103 statements into 17 equivalence classes. [2025-02-07 21:02:32,942 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 103 of 103 statements. [2025-02-07 21:02:32,942 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-02-07 21:02:32,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 402 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2025-02-07 21:02:34,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635428122] [2025-02-07 21:02:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635428122] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085530852] [2025-02-07 21:02:34,097 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 21:02:34,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:34,100 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 21:02:34,101 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 21:02:34,148 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 103 statements into 17 equivalence classes. [2025-02-07 21:02:34,176 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 103 of 103 statements. [2025-02-07 21:02:34,176 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-02-07 21:02:34,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:34,178 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 169 conjuncts are in the unsatisfiable core [2025-02-07 21:02:34,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 9 proven. 276 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-02-07 21:02:35,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 448 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-02-07 21:02:37,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085530852] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:37,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 28, 45] total 93 [2025-02-07 21:02:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863389137] [2025-02-07 21:02:37,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:37,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2025-02-07 21:02:37,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:37,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2025-02-07 21:02:37,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=8223, Unknown=0, NotChecked=0, Total=8556 [2025-02-07 21:02:37,793 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 93 states, 89 states have (on average 1.5280898876404494) internal successors, (136), 57 states have internal predecessors, (136), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (39), 36 states have call predecessors, (39), 25 states have call successors, (39) [2025-02-07 21:02:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:39,535 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2025-02-07 21:02:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 21:02:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 89 states have (on average 1.5280898876404494) internal successors, (136), 57 states have internal predecessors, (136), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (39), 36 states have call predecessors, (39), 25 states have call successors, (39) Word has length 103 [2025-02-07 21:02:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:39,536 INFO L225 Difference]: With dead ends: 68 [2025-02-07 21:02:39,536 INFO L226 Difference]: Without dead ends: 61 [2025-02-07 21:02:39,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1153, Invalid=14347, Unknown=0, NotChecked=0, Total=15500 [2025-02-07 21:02:39,542 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:39,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 872 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-07 21:02:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-02-07 21:02:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2025-02-07 21:02:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 11 states have return successors, (23), 13 states have call predecessors, (23), 5 states have call successors, (23) [2025-02-07 21:02:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2025-02-07 21:02:39,557 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 103 [2025-02-07 21:02:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:39,558 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2025-02-07 21:02:39,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 89 states have (on average 1.5280898876404494) internal successors, (136), 57 states have internal predecessors, (136), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (39), 36 states have call predecessors, (39), 25 states have call successors, (39) [2025-02-07 21:02:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2025-02-07 21:02:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-02-07 21:02:39,559 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:39,560 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:39,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-07 21:02:39,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:39,764 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:39,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -246727138, now seen corresponding path program 13 times [2025-02-07 21:02:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088899760] [2025-02-07 21:02:39,765 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:02:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:39,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-02-07 21:02:39,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-02-07 21:02:39,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:02:39,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-02-07 21:02:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088899760] [2025-02-07 21:02:41,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088899760] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31896983] [2025-02-07 21:02:41,388 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 21:02:41,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:41,390 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 21:02:41,392 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 21:02:41,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-02-07 21:02:41,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-02-07 21:02:41,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:02:41,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:41,475 WARN L254 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 181 conjuncts are in the unsatisfiable core [2025-02-07 21:02:41,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 10 proven. 319 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2025-02-07 21:02:42,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 47 proven. 525 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-02-07 21:02:45,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31896983] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:45,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:45,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 30, 48] total 112 [2025-02-07 21:02:45,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881388975] [2025-02-07 21:02:45,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:45,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2025-02-07 21:02:45,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:45,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2025-02-07 21:02:45,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=12043, Unknown=0, NotChecked=0, Total=12432 [2025-02-07 21:02:45,942 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 112 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 71 states have internal predecessors, (165), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (42), 41 states have call predecessors, (42), 31 states have call successors, (42) [2025-02-07 21:02:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:48,209 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2025-02-07 21:02:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-02-07 21:02:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 71 states have internal predecessors, (165), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (42), 41 states have call predecessors, (42), 31 states have call successors, (42) Word has length 110 [2025-02-07 21:02:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:48,211 INFO L225 Difference]: With dead ends: 71 [2025-02-07 21:02:48,211 INFO L226 Difference]: Without dead ends: 64 [2025-02-07 21:02:48,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4238 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1449, Invalid=19721, Unknown=0, NotChecked=0, Total=21170 [2025-02-07 21:02:48,213 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:48,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1027 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3130 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-07 21:02:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-07 21:02:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2025-02-07 21:02:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (25), 14 states have call predecessors, (25), 5 states have call successors, (25) [2025-02-07 21:02:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2025-02-07 21:02:48,219 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 110 [2025-02-07 21:02:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:48,219 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2025-02-07 21:02:48,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 71 states have internal predecessors, (165), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (42), 41 states have call predecessors, (42), 31 states have call successors, (42) [2025-02-07 21:02:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2025-02-07 21:02:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-07 21:02:48,220 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:48,220 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:48,230 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 21:02:48,421 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,SelfDestructingSolverStorable16 [2025-02-07 21:02:48,421 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:48,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -246853082, now seen corresponding path program 14 times [2025-02-07 21:02:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:48,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553769500] [2025-02-07 21:02:48,421 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:02:48,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:48,426 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-07 21:02:48,439 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-07 21:02:48,439 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:02:48,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 660 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-07 21:02:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:02:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553769500] [2025-02-07 21:02:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553769500] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:02:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882306892] [2025-02-07 21:02:50,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 21:02:50,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:02:50,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:02:50,136 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 21:02:50,138 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 21:02:50,197 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-07 21:02:50,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-07 21:02:50,222 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 21:02:50,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:02:50,224 WARN L254 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 193 conjuncts are in the unsatisfiable core [2025-02-07 21:02:50,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:02:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 11 proven. 365 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2025-02-07 21:02:51,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:02:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 50 proven. 608 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2025-02-07 21:02:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882306892] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:02:56,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:02:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 32, 51] total 119 [2025-02-07 21:02:56,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598745543] [2025-02-07 21:02:56,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:02:56,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2025-02-07 21:02:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:02:56,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2025-02-07 21:02:56,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=13629, Unknown=0, NotChecked=0, Total=14042 [2025-02-07 21:02:56,037 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 119 states, 114 states have (on average 1.5614035087719298) internal successors, (178), 75 states have internal predecessors, (178), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (45), 44 states have call predecessors, (45), 33 states have call successors, (45) [2025-02-07 21:02:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:02:58,778 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2025-02-07 21:02:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-07 21:02:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 114 states have (on average 1.5614035087719298) internal successors, (178), 75 states have internal predecessors, (178), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (45), 44 states have call predecessors, (45), 33 states have call successors, (45) Word has length 117 [2025-02-07 21:02:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:02:58,780 INFO L225 Difference]: With dead ends: 74 [2025-02-07 21:02:58,780 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 21:02:58,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1590, Invalid=22280, Unknown=0, NotChecked=0, Total=23870 [2025-02-07 21:02:58,781 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 162 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 3808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:02:58,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1134 Invalid, 3808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 3492 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-07 21:02:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 21:02:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2025-02-07 21:02:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (27), 15 states have call predecessors, (27), 5 states have call successors, (27) [2025-02-07 21:02:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2025-02-07 21:02:58,793 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 117 [2025-02-07 21:02:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:02:58,793 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2025-02-07 21:02:58,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 114 states have (on average 1.5614035087719298) internal successors, (178), 75 states have internal predecessors, (178), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (45), 44 states have call predecessors, (45), 33 states have call successors, (45) [2025-02-07 21:02:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2025-02-07 21:02:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2025-02-07 21:02:58,794 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:02:58,794 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:02:58,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-07 21:02:58,995 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,SelfDestructingSolverStorable17 [2025-02-07 21:02:58,995 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:02:58,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:02:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash 292384092, now seen corresponding path program 15 times [2025-02-07 21:02:58,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:02:58,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487035372] [2025-02-07 21:02:58,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:02:58,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:02:59,002 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 145 statements into 24 equivalence classes. [2025-02-07 21:02:59,043 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 145 of 145 statements. [2025-02-07 21:02:59,043 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-02-07 21:02:59,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:03:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 227 proven. 728 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2025-02-07 21:03:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:03:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487035372] [2025-02-07 21:03:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487035372] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:03:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803960281] [2025-02-07 21:03:00,984 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 21:03:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:03:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:03:00,987 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 21:03:00,988 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 21:03:01,053 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 145 statements into 24 equivalence classes. [2025-02-07 21:03:01,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 145 of 145 statements. [2025-02-07 21:03:01,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-02-07 21:03:01,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:03:01,106 WARN L254 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 241 conjuncts are in the unsatisfiable core [2025-02-07 21:03:01,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:03:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 12 proven. 573 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2025-02-07 21:03:02,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:03:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 71 proven. 991 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2025-02-07 21:03:08,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803960281] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:03:08,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:03:08,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 34, 63] total 128 [2025-02-07 21:03:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389176826] [2025-02-07 21:03:08,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:03:08,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2025-02-07 21:03:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:03:08,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2025-02-07 21:03:08,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=15796, Unknown=0, NotChecked=0, Total=16256 [2025-02-07 21:03:08,503 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 128 states, 125 states have (on average 1.52) internal successors, (190), 77 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 37 states have return successors, (52), 51 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-07 21:03:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:03:12,332 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2025-02-07 21:03:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-02-07 21:03:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 125 states have (on average 1.52) internal successors, (190), 77 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 37 states have return successors, (52), 51 states have call predecessors, (52), 32 states have call successors, (52) Word has length 145 [2025-02-07 21:03:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:03:12,334 INFO L225 Difference]: With dead ends: 88 [2025-02-07 21:03:12,334 INFO L226 Difference]: Without dead ends: 70 [2025-02-07 21:03:12,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6598 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2113, Invalid=28337, Unknown=0, NotChecked=0, Total=30450 [2025-02-07 21:03:12,336 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 258 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 5367 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 5964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 5367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-02-07 21:03:12,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1265 Invalid, 5964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 5367 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-02-07 21:03:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-02-07 21:03:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2025-02-07 21:03:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 14 states have return successors, (29), 16 states have call predecessors, (29), 5 states have call successors, (29) [2025-02-07 21:03:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2025-02-07 21:03:12,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 145 [2025-02-07 21:03:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:03:12,346 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2025-02-07 21:03:12,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 125 states have (on average 1.52) internal successors, (190), 77 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 37 states have return successors, (52), 51 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-07 21:03:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2025-02-07 21:03:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2025-02-07 21:03:12,348 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:03:12,348 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:03:12,355 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 21:03:12,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:03:12,552 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:03:12,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:03:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1038171502, now seen corresponding path program 16 times [2025-02-07 21:03:12,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:03:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354964622] [2025-02-07 21:03:12,553 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:03:12,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:03:12,557 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 131 statements into 2 equivalence classes. [2025-02-07 21:03:12,565 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 131 of 131 statements. [2025-02-07 21:03:12,565 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:03:12,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:03:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 56 proven. 520 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2025-02-07 21:03:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:03:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354964622] [2025-02-07 21:03:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354964622] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:03:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745849341] [2025-02-07 21:03:14,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 21:03:14,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:03:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:03:14,120 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 21:03:14,121 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 21:03:14,198 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 131 statements into 2 equivalence classes. [2025-02-07 21:03:14,228 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 131 of 131 statements. [2025-02-07 21:03:14,229 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 21:03:14,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:03:14,232 WARN L254 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-02-07 21:03:14,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:03:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 13 proven. 466 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2025-02-07 21:03:15,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:03:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 56 proven. 792 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-02-07 21:03:20,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745849341] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:03:20,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 21:03:20,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 36, 57] total 115 [2025-02-07 21:03:20,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008833203] [2025-02-07 21:03:20,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 21:03:20,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2025-02-07 21:03:20,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:03:20,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2025-02-07 21:03:20,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=12633, Unknown=0, NotChecked=0, Total=13110 [2025-02-07 21:03:20,418 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 115 states, 111 states have (on average 1.3873873873873874) internal successors, (154), 67 states have internal predecessors, (154), 22 states have call successors, (22), 1 states have call predecessors, (22), 33 states have return successors, (50), 48 states have call predecessors, (50), 22 states have call successors, (50) [2025-02-07 21:03:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:03:23,259 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2025-02-07 21:03:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 21:03:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 111 states have (on average 1.3873873873873874) internal successors, (154), 67 states have internal predecessors, (154), 22 states have call successors, (22), 1 states have call predecessors, (22), 33 states have return successors, (50), 48 states have call predecessors, (50), 22 states have call successors, (50) Word has length 131 [2025-02-07 21:03:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:03:23,264 INFO L225 Difference]: With dead ends: 80 [2025-02-07 21:03:23,264 INFO L226 Difference]: Without dead ends: 73 [2025-02-07 21:03:23,266 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5562 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1544, Invalid=22018, Unknown=0, NotChecked=0, Total=23562 [2025-02-07 21:03:23,268 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 284 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 3851 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 4169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 3851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-02-07 21:03:23,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1156 Invalid, 4169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 3851 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-02-07 21:03:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-02-07 21:03:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2025-02-07 21:03:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (31), 17 states have call predecessors, (31), 5 states have call successors, (31) [2025-02-07 21:03:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2025-02-07 21:03:23,287 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 131 [2025-02-07 21:03:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:03:23,287 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2025-02-07 21:03:23,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 111 states have (on average 1.3873873873873874) internal successors, (154), 67 states have internal predecessors, (154), 22 states have call successors, (22), 1 states have call predecessors, (22), 33 states have return successors, (50), 48 states have call predecessors, (50), 22 states have call successors, (50) [2025-02-07 21:03:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2025-02-07 21:03:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2025-02-07 21:03:23,289 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:03:23,289 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:03:23,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-07 21:03:23,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:03:23,493 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:03:23,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:03:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1638893438, now seen corresponding path program 17 times [2025-02-07 21:03:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:03:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961796124] [2025-02-07 21:03:23,494 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:03:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:03:23,499 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 166 statements into 28 equivalence classes. [2025-02-07 21:03:23,558 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) and asserted 166 of 166 statements. [2025-02-07 21:03:23,558 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2025-02-07 21:03:23,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:03:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 221 proven. 1040 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2025-02-07 21:03:26,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:03:26,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961796124] [2025-02-07 21:03:26,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961796124] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 21:03:26,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186459459] [2025-02-07 21:03:26,016 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 21:03:26,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:03:26,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:03:26,018 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 21:03:26,019 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 21:03:26,115 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 166 statements into 28 equivalence classes. [2025-02-07 21:03:26,167 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) and asserted 166 of 166 statements. [2025-02-07 21:03:26,167 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2025-02-07 21:03:26,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:03:26,175 WARN L254 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 277 conjuncts are in the unsatisfiable core [2025-02-07 21:03:26,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:03:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 14 proven. 763 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2025-02-07 21:03:28,610 INFO L312 TraceCheckSpWp]: Computing backward predicates...