./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.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/nla-digbench-scaling/egcd3-ll_unwindbound100.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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:35:03,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:35:03,974 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:35:03,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:35:03,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:35:03,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:35:03,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:35:03,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:35:03,991 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:35:03,991 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:35:03,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:35:03,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:35:03,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:35:03,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:35:03,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:35:03,993 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:35:03,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:35:03,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:35:03,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:35:03,994 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 -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2025-02-07 20:35:04,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:35:04,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:35:04,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:35:04,166 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:35:04,166 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:35:04,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2025-02-07 20:35:05,274 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a47c1769d/63ef76c2abc2467b93f93added79f4c6/FLAGf7e974e44 [2025-02-07 20:35:05,495 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:35:05,495 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2025-02-07 20:35:05,506 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a47c1769d/63ef76c2abc2467b93f93added79f4c6/FLAGf7e974e44 [2025-02-07 20:35:05,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a47c1769d/63ef76c2abc2467b93f93added79f4c6 [2025-02-07 20:35:05,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:35:05,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:35:05,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:35:05,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:35:05,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:35:05,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:35:05" (1/1) ... [2025-02-07 20:35:05,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7572f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:05, skipping insertion in model container [2025-02-07 20:35:05,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:35:05" (1/1) ... [2025-02-07 20:35:05,860 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:35:05,951 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/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2025-02-07 20:35:05,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:35:05,978 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:35:05,984 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/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2025-02-07 20:35:05,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:35:06,005 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:35:06,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06 WrapperNode [2025-02-07 20:35:06,006 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:35:06,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:35:06,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:35:06,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:35:06,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,027 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2025-02-07 20:35:06,028 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:35:06,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:35:06,029 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:35:06,029 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:35:06,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,035 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,044 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 20:35:06,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,046 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,050 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,050 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:35:06,052 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:35:06,052 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:35:06,052 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:35:06,055 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (1/1) ... [2025-02-07 20:35:06,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:35:06,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:06,077 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 20:35:06,080 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 20:35:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:35:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 20:35:06,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 20:35:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:35:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:35:06,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:35:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:35:06,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:35:06,150 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:35:06,151 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:35:06,287 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 20:35:06,287 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:35:06,296 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:35:06,297 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:35:06,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:35:06 BoogieIcfgContainer [2025-02-07 20:35:06,297 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:35:06,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:35:06,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:35:06,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:35:06,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:35:05" (1/3) ... [2025-02-07 20:35:06,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41479be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:35:06, skipping insertion in model container [2025-02-07 20:35:06,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:35:06" (2/3) ... [2025-02-07 20:35:06,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41479be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:35:06, skipping insertion in model container [2025-02-07 20:35:06,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:35:06" (3/3) ... [2025-02-07 20:35:06,304 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2025-02-07 20:35:06,314 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:35:06,315 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_unwindbound100.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 20:35:06,345 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:35:06,352 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;@33ba84d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:35:06,352 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:35:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-07 20:35:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-02-07 20:35:06,358 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:06,358 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:06,359 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:06,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1807676570, now seen corresponding path program 1 times [2025-02-07 20:35:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:06,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91831525] [2025-02-07 20:35:06,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:06,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-07 20:35:06,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 20:35:06,435 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:06,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:35:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91831525] [2025-02-07 20:35:06,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91831525] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:06,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447421443] [2025-02-07 20:35:06,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:06,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:06,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:06,490 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 20:35:06,494 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 20:35:06,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-07 20:35:06,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-07 20:35:06,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:06,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:06,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-07 20:35:06,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-07 20:35:06,567 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:35:06,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447421443] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:06,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:35:06,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-07 20:35:06,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267134526] [2025-02-07 20:35:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:06,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:35:06,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:06,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:35:06,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:35:06,585 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:35:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:06,599 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2025-02-07 20:35:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:35:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-02-07 20:35:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:06,605 INFO L225 Difference]: With dead ends: 64 [2025-02-07 20:35:06,605 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 20:35:06,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:35:06,609 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:06,610 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 20:35:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-02-07 20:35:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 20:35:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2025-02-07 20:35:06,636 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2025-02-07 20:35:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:06,636 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2025-02-07 20:35:06,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:35:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2025-02-07 20:35:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:35:06,637 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:06,638 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:06,644 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 20:35:06,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-07 20:35:06,842 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:06,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1469246174, now seen corresponding path program 1 times [2025-02-07 20:35:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857729093] [2025-02-07 20:35:06,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:06,851 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 20:35:06,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:35:06,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:06,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:06,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857729093] [2025-02-07 20:35:06,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857729093] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:06,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:06,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 20:35:06,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073061151] [2025-02-07 20:35:06,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:06,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:35:06,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:06,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:35:06,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:35:06,961 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:06,982 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2025-02-07 20:35:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:35:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-02-07 20:35:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:06,984 INFO L225 Difference]: With dead ends: 39 [2025-02-07 20:35:06,984 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 20:35:06,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:35:06,985 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:06,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 101 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:06,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 20:35:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-07 20:35:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 20:35:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2025-02-07 20:35:06,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2025-02-07 20:35:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:06,992 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2025-02-07 20:35:06,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2025-02-07 20:35:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-07 20:35:06,998 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:06,998 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:06,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-07 20:35:06,998 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:06,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1746893898, now seen corresponding path program 1 times [2025-02-07 20:35:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:06,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47396739] [2025-02-07 20:35:06,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:07,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-07 20:35:07,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-07 20:35:07,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:07,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:35:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47396739] [2025-02-07 20:35:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47396739] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:07,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:07,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-07 20:35:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217932261] [2025-02-07 20:35:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:07,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:35:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:07,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:35:07,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:07,127 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:07,179 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2025-02-07 20:35:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:35:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-02-07 20:35:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:07,180 INFO L225 Difference]: With dead ends: 52 [2025-02-07 20:35:07,180 INFO L226 Difference]: Without dead ends: 45 [2025-02-07 20:35:07,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:07,181 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:07,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 129 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-07 20:35:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2025-02-07 20:35:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-07 20:35:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2025-02-07 20:35:07,187 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2025-02-07 20:35:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:07,187 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2025-02-07 20:35:07,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2025-02-07 20:35:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 20:35:07,188 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:07,188 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:07,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-07 20:35:07,188 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:07,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash 970428589, now seen corresponding path program 1 times [2025-02-07 20:35:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444390725] [2025-02-07 20:35:07,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:07,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:07,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 20:35:07,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 20:35:07,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:07,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631862148] [2025-02-07 20:35:07,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:07,212 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 20:35:07,213 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 20:35:07,240 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 20:35:07,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 20:35:07,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:07,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:07,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:35:07,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:07,403 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:35:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444390725] [2025-02-07 20:35:07,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631862148] [2025-02-07 20:35:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631862148] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:07,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088161756] [2025-02-07 20:35:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:07,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:07,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:07,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:07,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:07,406 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:07,449 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2025-02-07 20:35:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2025-02-07 20:35:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:07,450 INFO L225 Difference]: With dead ends: 51 [2025-02-07 20:35:07,450 INFO L226 Difference]: Without dead ends: 49 [2025-02-07 20:35:07,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:07,451 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:07,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-07 20:35:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-02-07 20:35:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 34 states have internal predecessors, (44), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-07 20:35:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2025-02-07 20:35:07,461 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2025-02-07 20:35:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:07,462 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2025-02-07 20:35:07,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2025-02-07 20:35:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-07 20:35:07,462 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:07,462 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:07,472 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 20:35:07,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:07,663 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:07,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash 984106180, now seen corresponding path program 1 times [2025-02-07 20:35:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:07,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596297805] [2025-02-07 20:35:07,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:07,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-07 20:35:07,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-07 20:35:07,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:07,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:07,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596297805] [2025-02-07 20:35:07,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596297805] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:07,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:07,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:07,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914946126] [2025-02-07 20:35:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:07,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:07,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:07,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:07,749 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:07,772 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2025-02-07 20:35:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2025-02-07 20:35:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:07,777 INFO L225 Difference]: With dead ends: 72 [2025-02-07 20:35:07,777 INFO L226 Difference]: Without dead ends: 50 [2025-02-07 20:35:07,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 20:35:07,777 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:07,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-02-07 20:35:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-02-07 20:35:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-07 20:35:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2025-02-07 20:35:07,791 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2025-02-07 20:35:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:07,791 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2025-02-07 20:35:07,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2025-02-07 20:35:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 20:35:07,791 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:07,791 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:07,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-07 20:35:07,791 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:07,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash -740873018, now seen corresponding path program 1 times [2025-02-07 20:35:07,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:07,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116266703] [2025-02-07 20:35:07,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:07,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:07,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 20:35:07,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:35:07,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:07,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:07,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116266703] [2025-02-07 20:35:07,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116266703] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:07,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973683674] [2025-02-07 20:35:07,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:07,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:07,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:07,886 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 20:35:07,888 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 20:35:07,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 20:35:07,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:35:07,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:07,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:07,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:35:07,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:07,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973683674] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:08,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:35:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-02-07 20:35:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541834217] [2025-02-07 20:35:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:08,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-07 20:35:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:08,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-07 20:35:08,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:35:08,037 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:08,166 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2025-02-07 20:35:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:35:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2025-02-07 20:35:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:08,168 INFO L225 Difference]: With dead ends: 146 [2025-02-07 20:35:08,168 INFO L226 Difference]: Without dead ends: 139 [2025-02-07 20:35:08,168 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:35:08,173 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 82 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:08,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 222 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:35:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-02-07 20:35:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2025-02-07 20:35:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2025-02-07 20:35:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2025-02-07 20:35:08,188 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2025-02-07 20:35:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:08,188 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2025-02-07 20:35:08,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2025-02-07 20:35:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 20:35:08,189 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:08,190 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:08,196 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 20:35:08,394 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 20:35:08,394 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:08,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1541112114, now seen corresponding path program 1 times [2025-02-07 20:35:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240088571] [2025-02-07 20:35:08,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:08,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-07 20:35:08,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:35:08,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:08,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:35:08,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240088571] [2025-02-07 20:35:08,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240088571] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692946144] [2025-02-07 20:35:08,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:08,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:08,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:08,474 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 20:35:08,492 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 20:35:08,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-07 20:35:08,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:35:08,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:08,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:08,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:35:08,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:35:08,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:35:08,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692946144] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:08,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:35:08,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-07 20:35:08,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860843852] [2025-02-07 20:35:08,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:08,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:35:08,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:08,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:35:08,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:35:08,604 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:35:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:08,743 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2025-02-07 20:35:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-07 20:35:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2025-02-07 20:35:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:08,744 INFO L225 Difference]: With dead ends: 182 [2025-02-07 20:35:08,744 INFO L226 Difference]: Without dead ends: 170 [2025-02-07 20:35:08,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-02-07 20:35:08,745 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 113 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:08,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 289 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:35:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-02-07 20:35:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2025-02-07 20:35:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 97 states have internal predecessors, (130), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-02-07 20:35:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2025-02-07 20:35:08,759 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2025-02-07 20:35:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:08,759 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2025-02-07 20:35:08,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:35:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2025-02-07 20:35:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-07 20:35:08,760 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:08,760 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:08,768 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 20:35:08,964 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 20:35:08,964 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:08,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1954569055, now seen corresponding path program 1 times [2025-02-07 20:35:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:08,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585033179] [2025-02-07 20:35:08,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:08,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:35:08,976 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:35:08,976 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:08,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:08,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043703527] [2025-02-07 20:35:08,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:08,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:08,979 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 20:35:08,984 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 20:35:09,005 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-07 20:35:09,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-07 20:35:09,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:09,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:09,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:35:09,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:09,072 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:35:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585033179] [2025-02-07 20:35:09,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043703527] [2025-02-07 20:35:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043703527] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:09,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126416067] [2025-02-07 20:35:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:09,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:09,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:09,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:09,073 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 20:35:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:09,110 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2025-02-07 20:35:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2025-02-07 20:35:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:09,111 INFO L225 Difference]: With dead ends: 142 [2025-02-07 20:35:09,112 INFO L226 Difference]: Without dead ends: 140 [2025-02-07 20:35:09,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:09,112 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:09,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-02-07 20:35:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2025-02-07 20:35:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 106 states have internal predecessors, (139), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-02-07 20:35:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2025-02-07 20:35:09,124 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2025-02-07 20:35:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:09,124 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2025-02-07 20:35:09,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 20:35:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2025-02-07 20:35:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 20:35:09,125 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:09,125 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:09,133 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 20:35:09,329 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 20:35:09,329 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:09,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -657668971, now seen corresponding path program 1 times [2025-02-07 20:35:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:09,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355067234] [2025-02-07 20:35:09,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:09,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:09,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 20:35:09,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:35:09,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:09,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:09,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011719275] [2025-02-07 20:35:09,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:09,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:09,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:09,349 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 20:35:09,350 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 20:35:09,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 20:35:09,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:35:09,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:09,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:09,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 20:35:09,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:09,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:09,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:09,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355067234] [2025-02-07 20:35:09,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:09,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011719275] [2025-02-07 20:35:09,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011719275] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:09,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-02-07 20:35:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269726929] [2025-02-07 20:35:09,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:09,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 20:35:09,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:09,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 20:35:09,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:35:09,620 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:09,707 INFO L93 Difference]: Finished difference Result 174 states and 236 transitions. [2025-02-07 20:35:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:35:09,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2025-02-07 20:35:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:09,709 INFO L225 Difference]: With dead ends: 174 [2025-02-07 20:35:09,709 INFO L226 Difference]: Without dead ends: 172 [2025-02-07 20:35:09,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:35:09,709 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:09,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 292 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:35:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-02-07 20:35:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2025-02-07 20:35:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 127 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2025-02-07 20:35:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2025-02-07 20:35:09,724 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2025-02-07 20:35:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:09,725 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2025-02-07 20:35:09,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2025-02-07 20:35:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-07 20:35:09,726 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:09,726 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:09,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:35:09,927 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 20:35:09,931 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:09,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1954438271, now seen corresponding path program 1 times [2025-02-07 20:35:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971404883] [2025-02-07 20:35:09,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:09,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:09,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-07 20:35:09,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-07 20:35:09,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:09,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:09,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971404883] [2025-02-07 20:35:09,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971404883] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:09,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:09,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-07 20:35:09,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653309078] [2025-02-07 20:35:09,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:09,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:35:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:09,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:35:09,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:09,995 INFO L87 Difference]: Start difference. First operand 169 states and 231 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:10,018 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2025-02-07 20:35:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:35:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2025-02-07 20:35:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:10,020 INFO L225 Difference]: With dead ends: 236 [2025-02-07 20:35:10,020 INFO L226 Difference]: Without dead ends: 169 [2025-02-07 20:35:10,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:10,021 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:10,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-02-07 20:35:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2025-02-07 20:35:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 127 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2025-02-07 20:35:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2025-02-07 20:35:10,036 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2025-02-07 20:35:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:10,036 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2025-02-07 20:35:10,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2025-02-07 20:35:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-02-07 20:35:10,037 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:10,037 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:10,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-07 20:35:10,037 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:10,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2056824787, now seen corresponding path program 1 times [2025-02-07 20:35:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557654092] [2025-02-07 20:35:10,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:10,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:10,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:35:10,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:35:10,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:10,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:10,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529014017] [2025-02-07 20:35:10,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:10,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:10,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:10,049 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 20:35:10,055 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 20:35:10,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-07 20:35:10,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-07 20:35:10,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:10,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:10,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:35:10,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-07 20:35:10,127 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:35:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557654092] [2025-02-07 20:35:10,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529014017] [2025-02-07 20:35:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529014017] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:10,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331764178] [2025-02-07 20:35:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:10,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:10,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:10,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:10,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:10,129 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 20:35:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:10,187 INFO L93 Difference]: Finished difference Result 234 states and 330 transitions. [2025-02-07 20:35:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2025-02-07 20:35:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:10,189 INFO L225 Difference]: With dead ends: 234 [2025-02-07 20:35:10,189 INFO L226 Difference]: Without dead ends: 232 [2025-02-07 20:35:10,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:10,189 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:10,190 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2025-02-07 20:35:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2025-02-07 20:35:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 159 states have (on average 1.371069182389937) internal successors, (218), 160 states have internal predecessors, (218), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-02-07 20:35:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 319 transitions. [2025-02-07 20:35:10,213 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 319 transitions. Word has length 34 [2025-02-07 20:35:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:10,213 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 319 transitions. [2025-02-07 20:35:10,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-07 20:35:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 319 transitions. [2025-02-07 20:35:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-07 20:35:10,216 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:10,216 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:10,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 20:35:10,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:10,416 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:10,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2042058871, now seen corresponding path program 1 times [2025-02-07 20:35:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085352459] [2025-02-07 20:35:10,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:10,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-07 20:35:10,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 20:35:10,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:10,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:10,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277372998] [2025-02-07 20:35:10,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:10,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:10,431 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 20:35:10,432 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 20:35:10,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-02-07 20:35:10,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-02-07 20:35:10,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:10,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:10,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 20:35:10,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:10,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:10,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:10,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085352459] [2025-02-07 20:35:10,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:10,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277372998] [2025-02-07 20:35:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277372998] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:10,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:35:10,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-07 20:35:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062080418] [2025-02-07 20:35:10,611 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:10,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:35:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:10,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:35:10,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:35:10,611 INFO L87 Difference]: Start difference. First operand 225 states and 319 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 20:35:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:10,722 INFO L93 Difference]: Finished difference Result 237 states and 329 transitions. [2025-02-07 20:35:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:35:10,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2025-02-07 20:35:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:10,726 INFO L225 Difference]: With dead ends: 237 [2025-02-07 20:35:10,728 INFO L226 Difference]: Without dead ends: 235 [2025-02-07 20:35:10,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-07 20:35:10,729 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:10,729 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 232 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:35:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-02-07 20:35:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2025-02-07 20:35:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 165 states have (on average 1.3575757575757577) internal successors, (224), 166 states have internal predecessors, (224), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-02-07 20:35:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2025-02-07 20:35:10,746 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 36 [2025-02-07 20:35:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:10,747 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2025-02-07 20:35:10,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-07 20:35:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2025-02-07 20:35:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:35:10,749 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:10,749 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:10,758 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 20:35:10,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:10,954 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:10,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2028409951, now seen corresponding path program 1 times [2025-02-07 20:35:10,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:10,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276569699] [2025-02-07 20:35:10,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:10,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:35:10,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:35:10,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:10,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:10,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290165787] [2025-02-07 20:35:10,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:10,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:10,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:10,974 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 20:35:10,976 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 20:35:10,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-07 20:35:11,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-07 20:35:11,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:11,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:11,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-07 20:35:11,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-07 20:35:11,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:35:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276569699] [2025-02-07 20:35:11,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290165787] [2025-02-07 20:35:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290165787] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:11,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:11,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:11,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153404970] [2025-02-07 20:35:11,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:11,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:11,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:11,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:11,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:11,044 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 20:35:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:11,095 INFO L93 Difference]: Finished difference Result 308 states and 453 transitions. [2025-02-07 20:35:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:11,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2025-02-07 20:35:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:11,097 INFO L225 Difference]: With dead ends: 308 [2025-02-07 20:35:11,098 INFO L226 Difference]: Without dead ends: 306 [2025-02-07 20:35:11,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:11,098 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:11,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2025-02-07 20:35:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 291. [2025-02-07 20:35:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 196 states have internal predecessors, (253), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2025-02-07 20:35:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 426 transitions. [2025-02-07 20:35:11,126 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 426 transitions. Word has length 39 [2025-02-07 20:35:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:11,126 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 426 transitions. [2025-02-07 20:35:11,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-07 20:35:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 426 transitions. [2025-02-07 20:35:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 20:35:11,126 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:11,127 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:11,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 20:35:11,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:11,327 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:11,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash -963970339, now seen corresponding path program 1 times [2025-02-07 20:35:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:11,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872755037] [2025-02-07 20:35:11,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:11,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:35:11,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:35:11,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:11,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872755037] [2025-02-07 20:35:11,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872755037] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474224092] [2025-02-07 20:35:11,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:11,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:11,415 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 20:35:11,420 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 20:35:11,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:35:11,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:35:11,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:11,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:11,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:35:11,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:11,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:11,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474224092] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:11,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:35:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-02-07 20:35:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141712330] [2025-02-07 20:35:11,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:11,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 20:35:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:11,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 20:35:11,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:35:11,572 INFO L87 Difference]: Start difference. First operand 291 states and 426 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:11,811 INFO L93 Difference]: Finished difference Result 1093 states and 1584 transitions. [2025-02-07 20:35:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-07 20:35:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2025-02-07 20:35:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:11,816 INFO L225 Difference]: With dead ends: 1093 [2025-02-07 20:35:11,816 INFO L226 Difference]: Without dead ends: 896 [2025-02-07 20:35:11,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:35:11,818 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 216 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:11,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 292 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:35:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2025-02-07 20:35:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 857. [2025-02-07 20:35:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 567 states have (on average 1.2927689594356262) internal successors, (733), 590 states have internal predecessors, (733), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2025-02-07 20:35:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1191 transitions. [2025-02-07 20:35:11,898 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1191 transitions. Word has length 37 [2025-02-07 20:35:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:11,898 INFO L471 AbstractCegarLoop]: Abstraction has 857 states and 1191 transitions. [2025-02-07 20:35:11,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1191 transitions. [2025-02-07 20:35:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-07 20:35:11,899 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:11,899 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:11,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 20:35:12,099 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,SelfDestructingSolverStorable13 [2025-02-07 20:35:12,100 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:12,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash -330822661, now seen corresponding path program 1 times [2025-02-07 20:35:12,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:12,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266311461] [2025-02-07 20:35:12,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:12,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:12,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:35:12,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:35:12,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:12,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266311461] [2025-02-07 20:35:12,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266311461] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057487214] [2025-02-07 20:35:12,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:12,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:12,208 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 20:35:12,209 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 20:35:12,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-07 20:35:12,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-07 20:35:12,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:12,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:12,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:35:12,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:12,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057487214] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:12,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:35:12,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-02-07 20:35:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320553122] [2025-02-07 20:35:12,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:12,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:35:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:12,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:35:12,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:35:12,329 INFO L87 Difference]: Start difference. First operand 857 states and 1191 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:12,510 INFO L93 Difference]: Finished difference Result 1266 states and 1778 transitions. [2025-02-07 20:35:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 20:35:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2025-02-07 20:35:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:12,514 INFO L225 Difference]: With dead ends: 1266 [2025-02-07 20:35:12,515 INFO L226 Difference]: Without dead ends: 862 [2025-02-07 20:35:12,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2025-02-07 20:35:12,516 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 115 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:12,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 209 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:35:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2025-02-07 20:35:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 854. [2025-02-07 20:35:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 564 states have (on average 1.2606382978723405) internal successors, (711), 587 states have internal predecessors, (711), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2025-02-07 20:35:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1169 transitions. [2025-02-07 20:35:12,597 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1169 transitions. Word has length 37 [2025-02-07 20:35:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:12,598 INFO L471 AbstractCegarLoop]: Abstraction has 854 states and 1169 transitions. [2025-02-07 20:35:12,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1169 transitions. [2025-02-07 20:35:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 20:35:12,598 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:12,598 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:12,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-07 20:35:12,799 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,SelfDestructingSolverStorable14 [2025-02-07 20:35:12,799 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:12,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1815665581, now seen corresponding path program 2 times [2025-02-07 20:35:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:12,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062054639] [2025-02-07 20:35:12,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:35:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:12,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-07 20:35:12,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 20:35:12,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:35:12,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:35:12,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:12,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062054639] [2025-02-07 20:35:12,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062054639] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:12,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:12,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:12,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621980993] [2025-02-07 20:35:12,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:12,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:12,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:12,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:12,847 INFO L87 Difference]: Start difference. First operand 854 states and 1169 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:12,997 INFO L93 Difference]: Finished difference Result 1146 states and 1611 transitions. [2025-02-07 20:35:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:35:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2025-02-07 20:35:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:13,002 INFO L225 Difference]: With dead ends: 1146 [2025-02-07 20:35:13,002 INFO L226 Difference]: Without dead ends: 910 [2025-02-07 20:35:13,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:35:13,003 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 30 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:13,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 177 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2025-02-07 20:35:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 802. [2025-02-07 20:35:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 532 states have (on average 1.25) internal successors, (665), 554 states have internal predecessors, (665), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2025-02-07 20:35:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1083 transitions. [2025-02-07 20:35:13,110 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1083 transitions. Word has length 38 [2025-02-07 20:35:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:13,110 INFO L471 AbstractCegarLoop]: Abstraction has 802 states and 1083 transitions. [2025-02-07 20:35:13,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-07 20:35:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1083 transitions. [2025-02-07 20:35:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-07 20:35:13,111 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:13,111 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:13,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-07 20:35:13,111 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:13,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash -381656869, now seen corresponding path program 1 times [2025-02-07 20:35:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:13,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67444771] [2025-02-07 20:35:13,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:13,116 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-07 20:35:13,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 20:35:13,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:13,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812755446] [2025-02-07 20:35:13,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:13,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:13,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:13,127 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 20:35:13,129 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 20:35:13,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-02-07 20:35:13,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-02-07 20:35:13,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:13,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:13,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-07 20:35:13,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-07 20:35:13,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:35:14,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67444771] [2025-02-07 20:35:14,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812755446] [2025-02-07 20:35:14,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812755446] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:14,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:14,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-02-07 20:35:14,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57282122] [2025-02-07 20:35:14,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:14,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 20:35:14,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:14,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 20:35:14,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-02-07 20:35:14,079 INFO L87 Difference]: Start difference. First operand 802 states and 1083 transitions. Second operand has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 20:35:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:15,803 INFO L93 Difference]: Finished difference Result 1386 states and 1907 transitions. [2025-02-07 20:35:15,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-07 20:35:15,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 53 [2025-02-07 20:35:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:15,809 INFO L225 Difference]: With dead ends: 1386 [2025-02-07 20:35:15,809 INFO L226 Difference]: Without dead ends: 1052 [2025-02-07 20:35:15,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-02-07 20:35:15,812 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 247 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:15,812 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 840 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-02-07 20:35:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2025-02-07 20:35:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 897. [2025-02-07 20:35:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 605 states have (on average 1.2512396694214876) internal successors, (757), 623 states have internal predecessors, (757), 226 states have call successors, (226), 65 states have call predecessors, (226), 65 states have return successors, (222), 208 states have call predecessors, (222), 222 states have call successors, (222) [2025-02-07 20:35:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1205 transitions. [2025-02-07 20:35:15,955 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1205 transitions. Word has length 53 [2025-02-07 20:35:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:15,956 INFO L471 AbstractCegarLoop]: Abstraction has 897 states and 1205 transitions. [2025-02-07 20:35:15,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 20:35:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1205 transitions. [2025-02-07 20:35:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-07 20:35:15,956 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:15,956 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:15,963 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 20:35:16,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-07 20:35:16,161 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:16,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1203626751, now seen corresponding path program 1 times [2025-02-07 20:35:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:16,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463638097] [2025-02-07 20:35:16,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:16,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:16,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-07 20:35:16,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 20:35:16,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:16,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:35:16,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:16,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463638097] [2025-02-07 20:35:16,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463638097] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:16,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227457983] [2025-02-07 20:35:16,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:16,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:16,307 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 20:35:16,310 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 20:35:16,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-07 20:35:16,345 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-07 20:35:16,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:16,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:16,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 20:35:16,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:35:16,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:35:16,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227457983] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:16,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:35:16,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2025-02-07 20:35:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888361637] [2025-02-07 20:35:16,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:16,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 20:35:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:16,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 20:35:16,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:35:16,509 INFO L87 Difference]: Start difference. First operand 897 states and 1205 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-02-07 20:35:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:17,102 INFO L93 Difference]: Finished difference Result 1991 states and 2820 transitions. [2025-02-07 20:35:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-07 20:35:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 59 [2025-02-07 20:35:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:17,111 INFO L225 Difference]: With dead ends: 1991 [2025-02-07 20:35:17,111 INFO L226 Difference]: Without dead ends: 1969 [2025-02-07 20:35:17,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2025-02-07 20:35:17,112 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 288 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:17,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 341 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:35:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2025-02-07 20:35:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1869. [2025-02-07 20:35:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1245 states have (on average 1.2915662650602409) internal successors, (1608), 1304 states have internal predecessors, (1608), 518 states have call successors, (518), 105 states have call predecessors, (518), 105 states have return successors, (510), 459 states have call predecessors, (510), 510 states have call successors, (510) [2025-02-07 20:35:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2636 transitions. [2025-02-07 20:35:17,426 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2636 transitions. Word has length 59 [2025-02-07 20:35:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:17,427 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2636 transitions. [2025-02-07 20:35:17,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-02-07 20:35:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2636 transitions. [2025-02-07 20:35:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-07 20:35:17,427 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:17,427 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:17,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-07 20:35:17,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-07 20:35:17,628 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:17,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1922260702, now seen corresponding path program 1 times [2025-02-07 20:35:17,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:17,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238511049] [2025-02-07 20:35:17,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:17,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-02-07 20:35:17,639 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 20:35:17,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:17,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:17,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829129733] [2025-02-07 20:35:17,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:17,644 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 20:35:17,647 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 20:35:17,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-02-07 20:35:17,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-02-07 20:35:17,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:17,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:17,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-07 20:35:17,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-02-07 20:35:17,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-02-07 20:35:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238511049] [2025-02-07 20:35:17,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829129733] [2025-02-07 20:35:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829129733] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:17,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:35:17,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-02-07 20:35:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712126897] [2025-02-07 20:35:17,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:17,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:17,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:17,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:17,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:35:17,780 INFO L87 Difference]: Start difference. First operand 1869 states and 2636 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:18,058 INFO L93 Difference]: Finished difference Result 1907 states and 2673 transitions. [2025-02-07 20:35:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2025-02-07 20:35:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:18,065 INFO L225 Difference]: With dead ends: 1907 [2025-02-07 20:35:18,066 INFO L226 Difference]: Without dead ends: 1905 [2025-02-07 20:35:18,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:35:18,066 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 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 20:35:18,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2025-02-07 20:35:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1905. [2025-02-07 20:35:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1272 states have (on average 1.2838050314465408) internal successors, (1633), 1331 states have internal predecessors, (1633), 518 states have call successors, (518), 114 states have call predecessors, (518), 114 states have return successors, (510), 459 states have call predecessors, (510), 510 states have call successors, (510) [2025-02-07 20:35:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 2661 transitions. [2025-02-07 20:35:18,463 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 2661 transitions. Word has length 62 [2025-02-07 20:35:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:18,463 INFO L471 AbstractCegarLoop]: Abstraction has 1905 states and 2661 transitions. [2025-02-07 20:35:18,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:35:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 2661 transitions. [2025-02-07 20:35:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-02-07 20:35:18,464 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:18,465 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:18,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-07 20:35:18,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:18,669 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:18,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:18,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1314086032, now seen corresponding path program 1 times [2025-02-07 20:35:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:18,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971035296] [2025-02-07 20:35:18,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:18,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-02-07 20:35:18,682 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-02-07 20:35:18,682 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:18,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:18,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268908615] [2025-02-07 20:35:18,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:18,689 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 20:35:18,697 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 20:35:18,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-02-07 20:35:18,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-02-07 20:35:18,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:18,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:18,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-02-07 20:35:18,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-07 20:35:19,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:19,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971035296] [2025-02-07 20:35:19,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268908615] [2025-02-07 20:35:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268908615] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:35:19,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:35:19,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-02-07 20:35:19,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801493463] [2025-02-07 20:35:19,223 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:19,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-07 20:35:19,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:19,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-07 20:35:19,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:35:19,224 INFO L87 Difference]: Start difference. First operand 1905 states and 2661 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 20:35:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:19,930 INFO L93 Difference]: Finished difference Result 2258 states and 3193 transitions. [2025-02-07 20:35:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-07 20:35:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2025-02-07 20:35:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:19,939 INFO L225 Difference]: With dead ends: 2258 [2025-02-07 20:35:19,939 INFO L226 Difference]: Without dead ends: 2256 [2025-02-07 20:35:19,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2025-02-07 20:35:19,940 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 107 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:19,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 717 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:35:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2025-02-07 20:35:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2211. [2025-02-07 20:35:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 1472 states have (on average 1.299592391304348) internal successors, (1913), 1544 states have internal predecessors, (1913), 618 states have call successors, (618), 120 states have call predecessors, (618), 120 states have return successors, (610), 546 states have call predecessors, (610), 610 states have call successors, (610) [2025-02-07 20:35:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3141 transitions. [2025-02-07 20:35:20,282 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3141 transitions. Word has length 65 [2025-02-07 20:35:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:20,282 INFO L471 AbstractCegarLoop]: Abstraction has 2211 states and 3141 transitions. [2025-02-07 20:35:20,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-07 20:35:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3141 transitions. [2025-02-07 20:35:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-02-07 20:35:20,283 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:20,283 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:20,289 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 20:35:20,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:20,487 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:20,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 523729490, now seen corresponding path program 2 times [2025-02-07 20:35:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:20,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402385680] [2025-02-07 20:35:20,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:35:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:20,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-02-07 20:35:20,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-02-07 20:35:20,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:35:20,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-07 20:35:20,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:20,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402385680] [2025-02-07 20:35:20,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402385680] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:35:20,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:35:20,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:35:20,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093564673] [2025-02-07 20:35:20,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:35:20,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:35:20,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:20,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:35:20,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:35:20,540 INFO L87 Difference]: Start difference. First operand 2211 states and 3141 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-07 20:35:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:20,859 INFO L93 Difference]: Finished difference Result 3465 states and 4893 transitions. [2025-02-07 20:35:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:35:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2025-02-07 20:35:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:20,868 INFO L225 Difference]: With dead ends: 3465 [2025-02-07 20:35:20,868 INFO L226 Difference]: Without dead ends: 2113 [2025-02-07 20:35:20,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:35:20,872 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:20,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 127 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:35:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2025-02-07 20:35:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2034. [2025-02-07 20:35:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1399 states have (on average 1.28734810578985) internal successors, (1801), 1430 states have internal predecessors, (1801), 514 states have call successors, (514), 120 states have call predecessors, (514), 120 states have return successors, (506), 483 states have call predecessors, (506), 506 states have call successors, (506) [2025-02-07 20:35:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2821 transitions. [2025-02-07 20:35:21,163 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2821 transitions. Word has length 68 [2025-02-07 20:35:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:21,164 INFO L471 AbstractCegarLoop]: Abstraction has 2034 states and 2821 transitions. [2025-02-07 20:35:21,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-07 20:35:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2821 transitions. [2025-02-07 20:35:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-02-07 20:35:21,165 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:21,165 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:21,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-07 20:35:21,166 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:21,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:21,166 INFO L85 PathProgramCache]: Analyzing trace with hash -536378020, now seen corresponding path program 3 times [2025-02-07 20:35:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528869950] [2025-02-07 20:35:21,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:35:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:21,170 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 70 statements into 6 equivalence classes. [2025-02-07 20:35:21,194 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 70 of 70 statements. [2025-02-07 20:35:21,194 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:35:21,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:21,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033520700] [2025-02-07 20:35:21,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:35:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:21,197 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 20:35:21,198 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 20:35:21,220 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 70 statements into 6 equivalence classes. [2025-02-07 20:35:21,239 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 55 of 70 statements. [2025-02-07 20:35:21,239 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-07 20:35:21,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:21,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-07 20:35:21,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-02-07 20:35:21,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-02-07 20:35:22,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528869950] [2025-02-07 20:35:22,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033520700] [2025-02-07 20:35:22,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033520700] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:22,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:22,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2025-02-07 20:35:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097134280] [2025-02-07 20:35:22,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:22,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 20:35:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:22,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 20:35:22,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2025-02-07 20:35:22,545 INFO L87 Difference]: Start difference. First operand 2034 states and 2821 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 26 states have internal predecessors, (75), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-07 20:35:29,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-07 20:35:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:32,550 INFO L93 Difference]: Finished difference Result 2698 states and 3769 transitions. [2025-02-07 20:35:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-02-07 20:35:32,551 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 26 states have internal predecessors, (75), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 70 [2025-02-07 20:35:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:32,560 INFO L225 Difference]: With dead ends: 2698 [2025-02-07 20:35:32,560 INFO L226 Difference]: Without dead ends: 2696 [2025-02-07 20:35:32,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1176, Invalid=4524, Unknown=0, NotChecked=0, Total=5700 [2025-02-07 20:35:32,562 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 496 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 329 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:32,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 944 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 684 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2025-02-07 20:35:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2025-02-07 20:35:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2375. [2025-02-07 20:35:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 1671 states have (on average 1.291442250149611) internal successors, (2158), 1706 states have internal predecessors, (2158), 562 states have call successors, (562), 141 states have call predecessors, (562), 141 states have return successors, (554), 527 states have call predecessors, (554), 554 states have call successors, (554) [2025-02-07 20:35:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3274 transitions. [2025-02-07 20:35:33,023 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3274 transitions. Word has length 70 [2025-02-07 20:35:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:33,024 INFO L471 AbstractCegarLoop]: Abstraction has 2375 states and 3274 transitions. [2025-02-07 20:35:33,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 26 states have internal predecessors, (75), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-07 20:35:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3274 transitions. [2025-02-07 20:35:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-02-07 20:35:33,025 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:33,025 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:33,031 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 20:35:33,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:33,227 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:33,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash -950590019, now seen corresponding path program 1 times [2025-02-07 20:35:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:33,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919924421] [2025-02-07 20:35:33,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:33,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:33,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-02-07 20:35:33,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-02-07 20:35:33,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:33,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821430990] [2025-02-07 20:35:33,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:33,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:33,239 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 20:35:33,244 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 20:35:33,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-02-07 20:35:33,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-02-07 20:35:33,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:33,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:33,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-07 20:35:33,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-07 20:35:33,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-02-07 20:35:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919924421] [2025-02-07 20:35:33,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821430990] [2025-02-07 20:35:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821430990] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:33,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:33,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-07 20:35:33,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588194168] [2025-02-07 20:35:33,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:33,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-07 20:35:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:33,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-07 20:35:33,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:35:33,746 INFO L87 Difference]: Start difference. First operand 2375 states and 3274 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-07 20:35:35,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:35,217 INFO L93 Difference]: Finished difference Result 3617 states and 5244 transitions. [2025-02-07 20:35:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-07 20:35:35,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2025-02-07 20:35:35,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:35,232 INFO L225 Difference]: With dead ends: 3617 [2025-02-07 20:35:35,232 INFO L226 Difference]: Without dead ends: 3613 [2025-02-07 20:35:35,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2025-02-07 20:35:35,233 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 200 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:35,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 441 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:35:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2025-02-07 20:35:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3383. [2025-02-07 20:35:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2192 states have (on average 1.3412408759124088) internal successors, (2940), 2248 states have internal predecessors, (2940), 1026 states have call successors, (1026), 165 states have call predecessors, (1026), 164 states have return successors, (1018), 969 states have call predecessors, (1018), 1018 states have call successors, (1018) [2025-02-07 20:35:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4984 transitions. [2025-02-07 20:35:36,255 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4984 transitions. Word has length 84 [2025-02-07 20:35:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:36,256 INFO L471 AbstractCegarLoop]: Abstraction has 3383 states and 4984 transitions. [2025-02-07 20:35:36,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-07 20:35:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4984 transitions. [2025-02-07 20:35:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-02-07 20:35:36,258 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:36,258 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:36,264 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 20:35:36,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:36,462 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:36,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash -834311098, now seen corresponding path program 1 times [2025-02-07 20:35:36,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:36,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979549604] [2025-02-07 20:35:36,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:36,466 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-07 20:35:36,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-07 20:35:36,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:36,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643335300] [2025-02-07 20:35:36,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:36,481 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 20:35:36,482 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 20:35:36,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-07 20:35:36,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-07 20:35:36,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:36,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:36,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-07 20:35:36,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-02-07 20:35:37,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-02-07 20:35:38,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979549604] [2025-02-07 20:35:38,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643335300] [2025-02-07 20:35:38,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643335300] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:38,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:38,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2025-02-07 20:35:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472856367] [2025-02-07 20:35:38,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:38,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-07 20:35:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:38,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-07 20:35:38,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2025-02-07 20:35:38,042 INFO L87 Difference]: Start difference. First operand 3383 states and 4984 transitions. Second operand has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-07 20:35:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:45,808 INFO L93 Difference]: Finished difference Result 4362 states and 6362 transitions. [2025-02-07 20:35:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-02-07 20:35:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 83 [2025-02-07 20:35:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:45,824 INFO L225 Difference]: With dead ends: 4362 [2025-02-07 20:35:45,824 INFO L226 Difference]: Without dead ends: 4341 [2025-02-07 20:35:45,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1654, Invalid=6178, Unknown=0, NotChecked=0, Total=7832 [2025-02-07 20:35:45,827 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 490 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:45,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1344 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2025-02-07 20:35:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2025-02-07 20:35:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 3942. [2025-02-07 20:35:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 2655 states have (on average 1.3404896421845574) internal successors, (3559), 2712 states have internal predecessors, (3559), 1105 states have call successors, (1105), 181 states have call predecessors, (1105), 181 states have return successors, (1098), 1048 states have call predecessors, (1098), 1098 states have call successors, (1098) [2025-02-07 20:35:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5762 transitions. [2025-02-07 20:35:47,498 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5762 transitions. Word has length 83 [2025-02-07 20:35:47,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:47,498 INFO L471 AbstractCegarLoop]: Abstraction has 3942 states and 5762 transitions. [2025-02-07 20:35:47,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-02-07 20:35:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5762 transitions. [2025-02-07 20:35:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-07 20:35:47,499 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:47,500 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:47,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-07 20:35:47,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-02-07 20:35:47,701 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:47,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -18218489, now seen corresponding path program 1 times [2025-02-07 20:35:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155024713] [2025-02-07 20:35:47,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:47,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-02-07 20:35:47,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-02-07 20:35:47,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:47,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365493056] [2025-02-07 20:35:47,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:35:47,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:47,721 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:35:47,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-07 20:35:47,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-02-07 20:35:47,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-02-07 20:35:47,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:35:47,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:47,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:35:47,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-02-07 20:35:48,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-02-07 20:35:48,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155024713] [2025-02-07 20:35:48,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365493056] [2025-02-07 20:35:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365493056] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:48,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:48,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-02-07 20:35:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245905221] [2025-02-07 20:35:48,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:48,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 20:35:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:48,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 20:35:48,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-02-07 20:35:48,805 INFO L87 Difference]: Start difference. First operand 3942 states and 5762 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 20 states have internal predecessors, (67), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-02-07 20:35:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:35:56,447 INFO L93 Difference]: Finished difference Result 4908 states and 7261 transitions. [2025-02-07 20:35:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-02-07 20:35:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 20 states have internal predecessors, (67), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 86 [2025-02-07 20:35:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:35:56,485 INFO L225 Difference]: With dead ends: 4908 [2025-02-07 20:35:56,491 INFO L226 Difference]: Without dead ends: 4902 [2025-02-07 20:35:56,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1114, Invalid=4142, Unknown=0, NotChecked=0, Total=5256 [2025-02-07 20:35:56,495 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 309 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-02-07 20:35:56,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 945 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-02-07 20:35:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4902 states. [2025-02-07 20:35:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4902 to 4445. [2025-02-07 20:35:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4445 states, 2978 states have (on average 1.3509066487575554) internal successors, (4023), 3038 states have internal predecessors, (4023), 1272 states have call successors, (1272), 195 states have call predecessors, (1272), 194 states have return successors, (1266), 1211 states have call predecessors, (1266), 1266 states have call successors, (1266) [2025-02-07 20:35:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4445 states to 4445 states and 6561 transitions. [2025-02-07 20:35:58,645 INFO L78 Accepts]: Start accepts. Automaton has 4445 states and 6561 transitions. Word has length 86 [2025-02-07 20:35:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:35:58,645 INFO L471 AbstractCegarLoop]: Abstraction has 4445 states and 6561 transitions. [2025-02-07 20:35:58,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 20 states have internal predecessors, (67), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-02-07 20:35:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4445 states and 6561 transitions. [2025-02-07 20:35:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-02-07 20:35:58,647 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:35:58,647 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:35:58,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-07 20:35:58,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:58,847 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:35:58,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:35:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1409124893, now seen corresponding path program 4 times [2025-02-07 20:35:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:35:58,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487208816] [2025-02-07 20:35:58,848 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:35:58,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:35:58,852 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 92 statements into 2 equivalence classes. [2025-02-07 20:35:58,866 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-02-07 20:35:58,867 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:35:58,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:35:58,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681975262] [2025-02-07 20:35:58,869 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:35:58,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:35:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:35:58,873 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:35:58,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-07 20:35:58,896 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 92 statements into 2 equivalence classes. [2025-02-07 20:35:58,917 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 80 of 92 statements. [2025-02-07 20:35:58,917 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-07 20:35:58,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:35:58,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-02-07 20:35:58,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:35:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-02-07 20:35:59,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:35:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-02-07 20:35:59,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:35:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487208816] [2025-02-07 20:35:59,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:35:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681975262] [2025-02-07 20:35:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681975262] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:35:59,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:35:59,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 24 [2025-02-07 20:35:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242503068] [2025-02-07 20:35:59,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:35:59,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:35:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:35:59,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:35:59,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:35:59,763 INFO L87 Difference]: Start difference. First operand 4445 states and 6561 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 21 states have internal predecessors, (84), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2025-02-07 20:36:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:36:03,085 INFO L93 Difference]: Finished difference Result 4871 states and 7165 transitions. [2025-02-07 20:36:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 20:36:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 21 states have internal predecessors, (84), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 92 [2025-02-07 20:36:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:36:03,100 INFO L225 Difference]: With dead ends: 4871 [2025-02-07 20:36:03,100 INFO L226 Difference]: Without dead ends: 4869 [2025-02-07 20:36:03,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2025-02-07 20:36:03,103 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 150 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 20:36:03,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 769 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 20:36:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2025-02-07 20:36:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 4731. [2025-02-07 20:36:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 3229 states have (on average 1.3511923196035924) internal successors, (4363), 3304 states have internal predecessors, (4363), 1294 states have call successors, (1294), 208 states have call predecessors, (1294), 207 states have return successors, (1288), 1218 states have call predecessors, (1288), 1288 states have call successors, (1288) [2025-02-07 20:36:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 6945 transitions. [2025-02-07 20:36:05,212 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 6945 transitions. Word has length 92 [2025-02-07 20:36:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:36:05,213 INFO L471 AbstractCegarLoop]: Abstraction has 4731 states and 6945 transitions. [2025-02-07 20:36:05,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 21 states have internal predecessors, (84), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2025-02-07 20:36:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 6945 transitions. [2025-02-07 20:36:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-02-07 20:36:05,215 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:36:05,215 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:36:05,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-07 20:36:05,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-07 20:36:05,416 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:36:05,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:36:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash 763656262, now seen corresponding path program 1 times [2025-02-07 20:36:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:36:05,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938695037] [2025-02-07 20:36:05,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:36:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:36:05,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-02-07 20:36:05,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-02-07 20:36:05,425 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:36:05,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:36:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-02-07 20:36:05,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:36:05,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938695037] [2025-02-07 20:36:05,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938695037] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:36:05,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656787664] [2025-02-07 20:36:05,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:36:05,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:36:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:36:05,618 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:36:05,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-07 20:36:05,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-02-07 20:36:05,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-02-07 20:36:05,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:36:05,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:36:05,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 20:36:05,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:36:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-02-07 20:36:05,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:36:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-02-07 20:36:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656787664] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:36:05,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:36:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2025-02-07 20:36:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583765051] [2025-02-07 20:36:05,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:36:05,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:36:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:36:05,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:36:05,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:36:05,943 INFO L87 Difference]: Start difference. First operand 4731 states and 6945 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2025-02-07 20:36:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:36:12,404 INFO L93 Difference]: Finished difference Result 12342 states and 19280 transitions. [2025-02-07 20:36:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-07 20:36:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 93 [2025-02-07 20:36:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:36:12,485 INFO L225 Difference]: With dead ends: 12342 [2025-02-07 20:36:12,486 INFO L226 Difference]: Without dead ends: 10678 [2025-02-07 20:36:12,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2025-02-07 20:36:12,503 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 464 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:36:12,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 462 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:36:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2025-02-07 20:36:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10266. [2025-02-07 20:36:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10266 states, 6340 states have (on average 1.372397476340694) internal successors, (8701), 6403 states have internal predecessors, (8701), 3562 states have call successors, (3562), 364 states have call predecessors, (3562), 363 states have return successors, (3550), 3498 states have call predecessors, (3550), 3550 states have call successors, (3550) [2025-02-07 20:36:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10266 states to 10266 states and 15813 transitions. [2025-02-07 20:36:18,497 INFO L78 Accepts]: Start accepts. Automaton has 10266 states and 15813 transitions. Word has length 93 [2025-02-07 20:36:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:36:18,497 INFO L471 AbstractCegarLoop]: Abstraction has 10266 states and 15813 transitions. [2025-02-07 20:36:18,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2025-02-07 20:36:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10266 states and 15813 transitions. [2025-02-07 20:36:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-02-07 20:36:18,498 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:36:18,498 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:36:18,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-07 20:36:18,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-07 20:36:18,703 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:36:18,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:36:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1339597784, now seen corresponding path program 2 times [2025-02-07 20:36:18,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:36:18,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099592648] [2025-02-07 20:36:18,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:36:18,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:36:18,709 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes. [2025-02-07 20:36:18,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-02-07 20:36:18,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:36:18,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:36:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-02-07 20:36:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:36:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099592648] [2025-02-07 20:36:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099592648] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:36:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745381898] [2025-02-07 20:36:18,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:36:18,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:36:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:36:18,856 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:36:18,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-07 20:36:18,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes. [2025-02-07 20:36:18,902 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-02-07 20:36:18,903 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:36:18,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:36:18,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 20:36:18,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:36:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-02-07 20:36:18,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:36:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-02-07 20:36:19,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745381898] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:36:19,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:36:19,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-02-07 20:36:19,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113835709] [2025-02-07 20:36:19,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:36:19,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-07 20:36:19,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:36:19,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-07 20:36:19,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:36:19,055 INFO L87 Difference]: Start difference. First operand 10266 states and 15813 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-07 20:36:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:36:26,762 INFO L93 Difference]: Finished difference Result 13697 states and 21314 transitions. [2025-02-07 20:36:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-07 20:36:26,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 94 [2025-02-07 20:36:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:36:26,844 INFO L225 Difference]: With dead ends: 13697 [2025-02-07 20:36:26,847 INFO L226 Difference]: Without dead ends: 13181 [2025-02-07 20:36:26,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 188 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2025-02-07 20:36:26,862 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 241 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:36:26,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 530 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:36:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13181 states. [2025-02-07 20:36:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13181 to 10372. [2025-02-07 20:36:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10372 states, 6452 states have (on average 1.37120272783633) internal successors, (8847), 6517 states have internal predecessors, (8847), 3556 states have call successors, (3556), 364 states have call predecessors, (3556), 363 states have return successors, (3544), 3490 states have call predecessors, (3544), 3544 states have call successors, (3544) [2025-02-07 20:36:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10372 states to 10372 states and 15947 transitions. [2025-02-07 20:36:32,979 INFO L78 Accepts]: Start accepts. Automaton has 10372 states and 15947 transitions. Word has length 94 [2025-02-07 20:36:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:36:32,980 INFO L471 AbstractCegarLoop]: Abstraction has 10372 states and 15947 transitions. [2025-02-07 20:36:32,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-07 20:36:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10372 states and 15947 transitions. [2025-02-07 20:36:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-02-07 20:36:32,981 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:36:32,981 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:36:32,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-07 20:36:33,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-07 20:36:33,182 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:36:33,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:36:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash 245631307, now seen corresponding path program 2 times [2025-02-07 20:36:33,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:36:33,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118802124] [2025-02-07 20:36:33,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:36:33,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:36:33,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-02-07 20:36:33,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-02-07 20:36:33,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:36:33,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:36:33,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691899109] [2025-02-07 20:36:33,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:36:33,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:36:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:36:33,209 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:36:33,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-07 20:36:33,235 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-02-07 20:36:33,258 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-02-07 20:36:33,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:36:33,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:36:33,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-07 20:36:33,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:36:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-02-07 20:36:34,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:36:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-02-07 20:36:34,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:36:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118802124] [2025-02-07 20:36:34,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:36:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691899109] [2025-02-07 20:36:34,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691899109] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:36:34,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:36:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2025-02-07 20:36:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283301022] [2025-02-07 20:36:34,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:36:34,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:36:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:36:34,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:36:34,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:36:34,555 INFO L87 Difference]: Start difference. First operand 10372 states and 15947 transitions. Second operand has 24 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2025-02-07 20:36:36,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []