./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 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/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:08:17,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:08:17,302 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:08:17,305 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:08:17,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:08:17,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:08:17,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:08:17,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:08:17,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:08:17,333 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:08:17,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:08:17,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:08:17,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:08:17,334 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:08:17,334 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:08:17,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:08:17,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:08:17,334 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:08:17,335 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:08:17,335 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:08:17,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:08:17,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:08:17,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:08:17,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:08:17,337 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 -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 [2025-01-09 03:08:17,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:08:17,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:08:17,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:08:17,527 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:08:17,527 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:08:17,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-ll.c [2025-01-09 03:08:18,641 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a0fa028ee/6722c20f8b0443d480fb345469310c49/FLAG6bc247ed1 [2025-01-09 03:08:18,877 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:08:18,877 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c [2025-01-09 03:08:18,891 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a0fa028ee/6722c20f8b0443d480fb345469310c49/FLAG6bc247ed1 [2025-01-09 03:08:18,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/a0fa028ee/6722c20f8b0443d480fb345469310c49 [2025-01-09 03:08:18,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:08:18,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:08:18,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:08:18,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:08:18,916 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:08:18,916 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:08:18" (1/1) ... [2025-01-09 03:08:18,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ab2556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:18, skipping insertion in model container [2025-01-09 03:08:18,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:08:18" (1/1) ... [2025-01-09 03:08:18,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:08:19,004 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/hard-ll.c[538,551] [2025-01-09 03:08:19,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:08:19,019 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:08:19,026 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/hard-ll.c[538,551] [2025-01-09 03:08:19,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:08:19,042 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:08:19,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19 WrapperNode [2025-01-09 03:08:19,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:08:19,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:08:19,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:08:19,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:08:19,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,061 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2025-01-09 03:08:19,061 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:08:19,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:08:19,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:08:19,062 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:08:19,067 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,074 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]. [2025-01-09 03:08:19,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,076 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:08:19,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:08:19,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:08:19,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:08:19,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (1/1) ... [2025-01-09 03:08:19,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:08:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:19,107 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) [2025-01-09 03:08:19,109 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 [2025-01-09 03:08:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:08:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:08:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:08:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:08:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:08:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:08:19,162 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:08:19,164 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:08:19,244 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-09 03:08:19,244 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:08:19,250 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:08:19,250 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 03:08:19,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:08:19 BoogieIcfgContainer [2025-01-09 03:08:19,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:08:19,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:08:19,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:08:19,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:08:19,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:08:18" (1/3) ... [2025-01-09 03:08:19,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd879e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:08:19, skipping insertion in model container [2025-01-09 03:08:19,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:08:19" (2/3) ... [2025-01-09 03:08:19,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd879e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:08:19, skipping insertion in model container [2025-01-09 03:08:19,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:08:19" (3/3) ... [2025-01-09 03:08:19,258 INFO L128 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2025-01-09 03:08:19,268 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:08:19,269 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll.c that has 2 procedures, 24 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 03:08:19,308 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:08:19,318 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;@1085d481, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:08:19,318 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:08:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-09 03:08:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 03:08:19,324 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:19,324 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:19,324 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:19,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:19,329 INFO L85 PathProgramCache]: Analyzing trace with hash 120815774, now seen corresponding path program 1 times [2025-01-09 03:08:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:19,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092511076] [2025-01-09 03:08:19,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:19,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:19,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 03:08:19,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 03:08:19,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:19,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:08:19,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:19,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092511076] [2025-01-09 03:08:19,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092511076] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:19,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:08:19,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 03:08:19,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790977325] [2025-01-09 03:08:19,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:19,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 03:08:19,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:19,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 03:08:19,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:08:19,447 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:08:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:19,457 INFO L93 Difference]: Finished difference Result 45 states and 75 transitions. [2025-01-09 03:08:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 03:08:19,458 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-09 03:08:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:19,462 INFO L225 Difference]: With dead ends: 45 [2025-01-09 03:08:19,462 INFO L226 Difference]: Without dead ends: 20 [2025-01-09 03:08:19,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:08:19,465 INFO L435 NwaCegarLoop]: 32 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, 32 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 [2025-01-09 03:08:19,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-01-09 03:08:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-01-09 03:08:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:08:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2025-01-09 03:08:19,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 8 [2025-01-09 03:08:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:19,498 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2025-01-09 03:08:19,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:08:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2025-01-09 03:08:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 03:08:19,498 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:19,498 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:19,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 03:08:19,499 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:19,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash 178074076, now seen corresponding path program 1 times [2025-01-09 03:08:19,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:19,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139110096] [2025-01-09 03:08:19,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:19,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:19,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 03:08:19,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 03:08:19,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:19,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:08:19,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:19,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139110096] [2025-01-09 03:08:19,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139110096] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:19,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:08:19,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:08:19,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930301987] [2025-01-09 03:08:19,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:19,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:19,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:19,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:19,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:19,597 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:08:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:19,643 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2025-01-09 03:08:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:19,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-09 03:08:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:19,645 INFO L225 Difference]: With dead ends: 32 [2025-01-09 03:08:19,645 INFO L226 Difference]: Without dead ends: 30 [2025-01-09 03:08:19,645 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 [2025-01-09 03:08:19,645 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:19,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-01-09 03:08:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2025-01-09 03:08:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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) [2025-01-09 03:08:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-01-09 03:08:19,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 8 [2025-01-09 03:08:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:19,657 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-01-09 03:08:19,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 03:08:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-01-09 03:08:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-09 03:08:19,658 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:19,658 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:19,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 03:08:19,658 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:19,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash 953479797, now seen corresponding path program 1 times [2025-01-09 03:08:19,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:19,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28038830] [2025-01-09 03:08:19,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:19,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:19,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 03:08:19,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 03:08:19,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:19,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 03:08:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:19,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28038830] [2025-01-09 03:08:19,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28038830] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:19,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:08:19,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:08:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075949469] [2025-01-09 03:08:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:19,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:19,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:19,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:19,767 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 03:08:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:19,819 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2025-01-09 03:08:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-01-09 03:08:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:19,821 INFO L225 Difference]: With dead ends: 36 [2025-01-09 03:08:19,821 INFO L226 Difference]: Without dead ends: 34 [2025-01-09 03:08:19,821 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 [2025-01-09 03:08:19,822 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:19,822 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-01-09 03:08:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2025-01-09 03:08:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:08:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2025-01-09 03:08:19,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2025-01-09 03:08:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:19,829 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2025-01-09 03:08:19,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 03:08:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2025-01-09 03:08:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 03:08:19,830 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:19,830 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:19,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 03:08:19,830 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:19,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash -56114884, now seen corresponding path program 1 times [2025-01-09 03:08:19,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249907224] [2025-01-09 03:08:19,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:19,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:08:19,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:08:19,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:19,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:19,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710153264] [2025-01-09 03:08:19,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:19,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:19,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:19,866 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) [2025-01-09 03:08:19,867 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 [2025-01-09 03:08:19,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:08:19,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:08:19,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:19,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:19,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:08:19,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:08:19,978 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:08:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249907224] [2025-01-09 03:08:19,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:19,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710153264] [2025-01-09 03:08:19,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710153264] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:19,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:08:19,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:08:19,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675471300] [2025-01-09 03:08:19,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:19,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:19,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:19,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:19,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:19,980 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2025-01-09 03:08:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:20,042 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2025-01-09 03:08:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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 [2025-01-09 03:08:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:20,043 INFO L225 Difference]: With dead ends: 51 [2025-01-09 03:08:20,043 INFO L226 Difference]: Without dead ends: 39 [2025-01-09 03:08:20,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:08:20,043 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:20,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-01-09 03:08:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-01-09 03:08:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-01-09 03:08:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2025-01-09 03:08:20,059 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2025-01-09 03:08:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:20,060 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2025-01-09 03:08:20,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 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) [2025-01-09 03:08:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2025-01-09 03:08:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 03:08:20,060 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:20,060 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:20,072 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 [2025-01-09 03:08:20,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:20,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:20,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash 440402527, now seen corresponding path program 1 times [2025-01-09 03:08:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386966140] [2025-01-09 03:08:20,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:20,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 03:08:20,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 03:08:20,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:20,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:20,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580589940] [2025-01-09 03:08:20,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:20,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:20,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:20,287 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) [2025-01-09 03:08:20,289 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 [2025-01-09 03:08:20,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 03:08:20,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 03:08:20,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:20,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:20,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:08:20,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 03:08:20,405 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:08:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386966140] [2025-01-09 03:08:20,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:20,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580589940] [2025-01-09 03:08:20,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580589940] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:20,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:08:20,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:08:20,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829606729] [2025-01-09 03:08:20,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:20,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:20,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:20,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:20,406 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-01-09 03:08:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:20,458 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2025-01-09 03:08:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-01-09 03:08:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:20,463 INFO L225 Difference]: With dead ends: 51 [2025-01-09 03:08:20,463 INFO L226 Difference]: Without dead ends: 49 [2025-01-09 03:08:20,463 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 [2025-01-09 03:08:20,463 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:20,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-01-09 03:08:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-01-09 03:08:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-01-09 03:08:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2025-01-09 03:08:20,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 24 [2025-01-09 03:08:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:20,473 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2025-01-09 03:08:20,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-01-09 03:08:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2025-01-09 03:08:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-01-09 03:08:20,474 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:20,474 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:20,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 03:08:20,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:20,678 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:20,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash -728619833, now seen corresponding path program 1 times [2025-01-09 03:08:20,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:20,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770933701] [2025-01-09 03:08:20,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:20,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:20,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-01-09 03:08:20,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-01-09 03:08:20,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:20,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159864518] [2025-01-09 03:08:20,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:20,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:20,696 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) [2025-01-09 03:08:20,697 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 [2025-01-09 03:08:20,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-01-09 03:08:20,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-01-09 03:08:20,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:20,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:20,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:08:20,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-01-09 03:08:20,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-01-09 03:08:20,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:20,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770933701] [2025-01-09 03:08:20,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:20,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159864518] [2025-01-09 03:08:20,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159864518] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 03:08:20,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:08:20,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-01-09 03:08:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359271903] [2025-01-09 03:08:20,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:20,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:20,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:20,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:20,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:08:20,853 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-01-09 03:08:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:20,909 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2025-01-09 03:08:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:20,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2025-01-09 03:08:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:20,911 INFO L225 Difference]: With dead ends: 57 [2025-01-09 03:08:20,911 INFO L226 Difference]: Without dead ends: 55 [2025-01-09 03:08:20,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-09 03:08:20,912 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:20,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-01-09 03:08:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2025-01-09 03:08:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2025-01-09 03:08:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2025-01-09 03:08:20,923 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 34 [2025-01-09 03:08:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:20,923 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2025-01-09 03:08:20,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-01-09 03:08:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2025-01-09 03:08:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-09 03:08:20,924 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:20,924 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:20,931 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 [2025-01-09 03:08:21,126 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 [2025-01-09 03:08:21,127 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:21,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash -821206152, now seen corresponding path program 1 times [2025-01-09 03:08:21,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:21,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693544268] [2025-01-09 03:08:21,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:21,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:21,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-09 03:08:21,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 03:08:21,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:21,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-01-09 03:08:21,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:21,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693544268] [2025-01-09 03:08:21,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693544268] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:21,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:08:21,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:08:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933739521] [2025-01-09 03:08:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:21,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:21,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:21,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:21,226 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-01-09 03:08:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:21,259 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2025-01-09 03:08:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2025-01-09 03:08:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:21,260 INFO L225 Difference]: With dead ends: 62 [2025-01-09 03:08:21,260 INFO L226 Difference]: Without dead ends: 51 [2025-01-09 03:08:21,260 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 [2025-01-09 03:08:21,261 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:21,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-01-09 03:08:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-01-09 03:08:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2025-01-09 03:08:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2025-01-09 03:08:21,268 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 40 [2025-01-09 03:08:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:21,268 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2025-01-09 03:08:21,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-01-09 03:08:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2025-01-09 03:08:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-01-09 03:08:21,269 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:21,269 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:21,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-09 03:08:21,269 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:21,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1422038353, now seen corresponding path program 1 times [2025-01-09 03:08:21,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:21,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605930815] [2025-01-09 03:08:21,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:21,275 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-01-09 03:08:21,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 03:08:21,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:21,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:21,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874540871] [2025-01-09 03:08:21,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:21,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:21,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:21,311 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) [2025-01-09 03:08:21,312 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 [2025-01-09 03:08:21,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-01-09 03:08:21,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 03:08:21,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:21,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:21,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 03:08:21,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-01-09 03:08:21,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-01-09 03:08:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605930815] [2025-01-09 03:08:22,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874540871] [2025-01-09 03:08:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874540871] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:08:22,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:08:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2025-01-09 03:08:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866181582] [2025-01-09 03:08:22,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:08:22,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 03:08:22,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:22,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 03:08:22,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-01-09 03:08:22,996 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-01-09 03:08:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:23,769 INFO L93 Difference]: Finished difference Result 127 states and 182 transitions. [2025-01-09 03:08:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 03:08:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 52 [2025-01-09 03:08:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:23,771 INFO L225 Difference]: With dead ends: 127 [2025-01-09 03:08:23,773 INFO L226 Difference]: Without dead ends: 106 [2025-01-09 03:08:23,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2025-01-09 03:08:23,774 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:23,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 171 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 03:08:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-01-09 03:08:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2025-01-09 03:08:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2025-01-09 03:08:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2025-01-09 03:08:23,796 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 52 [2025-01-09 03:08:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:23,796 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2025-01-09 03:08:23,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-01-09 03:08:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2025-01-09 03:08:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-01-09 03:08:23,799 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:23,799 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:23,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 03:08:23,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-09 03:08:24,000 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:24,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:24,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1807358855, now seen corresponding path program 1 times [2025-01-09 03:08:24,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:24,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212336684] [2025-01-09 03:08:24,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:24,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:24,005 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-01-09 03:08:24,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-01-09 03:08:24,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:24,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:24,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012644193] [2025-01-09 03:08:24,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:24,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:24,039 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) [2025-01-09 03:08:24,040 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 [2025-01-09 03:08:24,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-01-09 03:08:24,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-01-09 03:08:24,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:24,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:24,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-09 03:08:24,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-09 03:08:24,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-09 03:08:24,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212336684] [2025-01-09 03:08:24,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012644193] [2025-01-09 03:08:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012644193] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:08:24,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:08:24,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2025-01-09 03:08:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388554523] [2025-01-09 03:08:24,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:08:24,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 03:08:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:24,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 03:08:24,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-01-09 03:08:24,734 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-01-09 03:08:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:25,059 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2025-01-09 03:08:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 03:08:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 63 [2025-01-09 03:08:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:25,060 INFO L225 Difference]: With dead ends: 123 [2025-01-09 03:08:25,060 INFO L226 Difference]: Without dead ends: 92 [2025-01-09 03:08:25,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-01-09 03:08:25,061 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:25,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 221 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:08:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-01-09 03:08:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2025-01-09 03:08:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2025-01-09 03:08:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2025-01-09 03:08:25,082 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 63 [2025-01-09 03:08:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:25,082 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2025-01-09 03:08:25,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2025-01-09 03:08:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2025-01-09 03:08:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-01-09 03:08:25,083 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:25,083 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:25,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 03:08:25,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:25,288 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:25,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 219911800, now seen corresponding path program 2 times [2025-01-09 03:08:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:25,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554668652] [2025-01-09 03:08:25,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:08:25,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:25,294 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-01-09 03:08:25,314 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 03:08:25,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:08:25,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-09 03:08:25,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554668652] [2025-01-09 03:08:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554668652] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:08:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574942631] [2025-01-09 03:08:25,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:08:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:25,452 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) [2025-01-09 03:08:25,452 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 [2025-01-09 03:08:25,473 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-01-09 03:08:25,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 03:08:25,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:08:25,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:25,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:08:25,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-09 03:08:25,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-01-09 03:08:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574942631] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:08:25,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:08:25,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2025-01-09 03:08:25,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712359634] [2025-01-09 03:08:25,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:08:25,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:25,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:25,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:25,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:25,577 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-01-09 03:08:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:25,616 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2025-01-09 03:08:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:08:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 64 [2025-01-09 03:08:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:25,617 INFO L225 Difference]: With dead ends: 103 [2025-01-09 03:08:25,617 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 03:08:25,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:08:25,617 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:25,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 03:08:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-01-09 03:08:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2025-01-09 03:08:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2025-01-09 03:08:25,631 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 64 [2025-01-09 03:08:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:25,632 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2025-01-09 03:08:25,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-01-09 03:08:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2025-01-09 03:08:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-01-09 03:08:25,632 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:25,633 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:25,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 03:08:25,833 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,SelfDestructingSolverStorable9 [2025-01-09 03:08:25,833 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:25,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -423636374, now seen corresponding path program 1 times [2025-01-09 03:08:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:25,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096094950] [2025-01-09 03:08:25,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:25,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:25,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-01-09 03:08:25,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-01-09 03:08:25,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:25,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-01-09 03:08:26,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:26,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096094950] [2025-01-09 03:08:26,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096094950] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:08:26,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520987479] [2025-01-09 03:08:26,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:26,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:26,036 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) [2025-01-09 03:08:26,039 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 [2025-01-09 03:08:26,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-01-09 03:08:26,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-01-09 03:08:26,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:26,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:26,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 03:08:26,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-01-09 03:08:26,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2025-01-09 03:08:26,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520987479] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:08:26,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:08:26,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2025-01-09 03:08:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652984204] [2025-01-09 03:08:26,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:08:26,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 03:08:26,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:26,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 03:08:26,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-01-09 03:08:26,527 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2025-01-09 03:08:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:26,693 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2025-01-09 03:08:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 03:08:26,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 68 [2025-01-09 03:08:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:26,695 INFO L225 Difference]: With dead ends: 97 [2025-01-09 03:08:26,695 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 03:08:26,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-01-09 03:08:26,696 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:26,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 184 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:08:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 03:08:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2025-01-09 03:08:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2025-01-09 03:08:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2025-01-09 03:08:26,706 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 68 [2025-01-09 03:08:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:26,706 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2025-01-09 03:08:26,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2025-01-09 03:08:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2025-01-09 03:08:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-01-09 03:08:26,707 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:26,707 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:26,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 03:08:26,911 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 [2025-01-09 03:08:26,911 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:26,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:26,912 INFO L85 PathProgramCache]: Analyzing trace with hash 238559246, now seen corresponding path program 1 times [2025-01-09 03:08:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:26,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267922901] [2025-01-09 03:08:26,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:26,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-01-09 03:08:26,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 03:08:26,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:26,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2025-01-09 03:08:26,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267922901] [2025-01-09 03:08:26,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267922901] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:08:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41057482] [2025-01-09 03:08:26,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:08:26,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:26,959 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) [2025-01-09 03:08:26,966 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 [2025-01-09 03:08:26,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-01-09 03:08:26,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 03:08:26,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:08:26,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:26,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 03:08:26,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-01-09 03:08:27,013 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:08:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41057482] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:08:27,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:08:27,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2025-01-09 03:08:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600309548] [2025-01-09 03:08:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:08:27,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:08:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:27,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:08:27,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:08:27,014 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 03:08:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:27,047 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2025-01-09 03:08:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:08:27,047 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), 4 states have call successors, (13), 2 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 72 [2025-01-09 03:08:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:27,048 INFO L225 Difference]: With dead ends: 83 [2025-01-09 03:08:27,048 INFO L226 Difference]: Without dead ends: 71 [2025-01-09 03:08:27,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:08:27,049 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:27,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:08:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-09 03:08:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-01-09 03:08:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2025-01-09 03:08:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2025-01-09 03:08:27,058 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 72 [2025-01-09 03:08:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:27,058 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2025-01-09 03:08:27,058 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), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-01-09 03:08:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2025-01-09 03:08:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-01-09 03:08:27,059 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:27,059 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:27,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 03:08:27,259 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 [2025-01-09 03:08:27,260 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:27,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1583120701, now seen corresponding path program 3 times [2025-01-09 03:08:27,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:27,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112018454] [2025-01-09 03:08:27,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:08:27,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:27,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 80 statements into 8 equivalence classes. [2025-01-09 03:08:27,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 80 of 80 statements. [2025-01-09 03:08:27,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-01-09 03:08:27,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378221035] [2025-01-09 03:08:27,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:08:27,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:27,291 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) [2025-01-09 03:08:27,313 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 [2025-01-09 03:08:27,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 80 statements into 8 equivalence classes. [2025-01-09 03:08:27,372 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 54 of 80 statements. [2025-01-09 03:08:27,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 03:08:27,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:27,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-01-09 03:08:27,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 90 proven. 20 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-01-09 03:08:27,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 98 proven. 12 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-01-09 03:08:44,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112018454] [2025-01-09 03:08:44,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378221035] [2025-01-09 03:08:44,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378221035] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:08:44,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:08:44,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2025-01-09 03:08:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139258875] [2025-01-09 03:08:44,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:08:44,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 03:08:44,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:44,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 03:08:44,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:08:44,863 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2025-01-09 03:08:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:08:50,570 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2025-01-09 03:08:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 03:08:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) Word has length 80 [2025-01-09 03:08:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:08:50,572 INFO L225 Difference]: With dead ends: 148 [2025-01-09 03:08:50,572 INFO L226 Difference]: Without dead ends: 128 [2025-01-09 03:08:50,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2025-01-09 03:08:50,573 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:08:50,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 259 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2025-01-09 03:08:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-01-09 03:08:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2025-01-09 03:08:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 67 states have internal predecessors, (75), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2025-01-09 03:08:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2025-01-09 03:08:50,596 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 80 [2025-01-09 03:08:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:08:50,597 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2025-01-09 03:08:50,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2025-01-09 03:08:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2025-01-09 03:08:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-01-09 03:08:50,598 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:08:50,598 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:08:50,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 03:08:50,802 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 [2025-01-09 03:08:50,802 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:08:50,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:08:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1870214869, now seen corresponding path program 2 times [2025-01-09 03:08:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:08:50,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591706936] [2025-01-09 03:08:50,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:08:50,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:08:50,806 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 91 statements into 2 equivalence classes. [2025-01-09 03:08:50,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-01-09 03:08:50,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:08:50,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:08:50,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294263816] [2025-01-09 03:08:50,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:08:50,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:08:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:08:50,824 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) [2025-01-09 03:08:50,825 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 [2025-01-09 03:08:50,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 91 statements into 2 equivalence classes. [2025-01-09 03:08:50,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-01-09 03:08:50,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:08:50,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:08:50,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-01-09 03:08:50,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:08:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2025-01-09 03:08:51,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:08:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2025-01-09 03:08:59,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:08:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591706936] [2025-01-09 03:08:59,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:08:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294263816] [2025-01-09 03:08:59,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294263816] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:08:59,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 03:08:59,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2025-01-09 03:08:59,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799673051] [2025-01-09 03:08:59,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 03:08:59,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 03:08:59,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:08:59,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 03:08:59,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:08:59,942 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2025-01-09 03:09:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:09:02,495 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2025-01-09 03:09:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-09 03:09:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 91 [2025-01-09 03:09:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:09:02,497 INFO L225 Difference]: With dead ends: 133 [2025-01-09 03:09:02,497 INFO L226 Difference]: Without dead ends: 131 [2025-01-09 03:09:02,497 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 03:09:02,497 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:09:02,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 374 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2025-01-09 03:09:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-01-09 03:09:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2025-01-09 03:09:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 74 states have internal predecessors, (81), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (38), 33 states have call predecessors, (38), 38 states have call successors, (38) [2025-01-09 03:09:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2025-01-09 03:09:02,532 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 91 [2025-01-09 03:09:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:09:02,532 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2025-01-09 03:09:02,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2025-01-09 03:09:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2025-01-09 03:09:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-01-09 03:09:02,533 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:09:02,533 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:09:02,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 03:09:02,737 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 [2025-01-09 03:09:02,737 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:09:02,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:09:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2126519062, now seen corresponding path program 4 times [2025-01-09 03:09:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:09:02,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367855428] [2025-01-09 03:09:02,738 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:09:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:09:02,743 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 92 statements into 2 equivalence classes. [2025-01-09 03:09:02,764 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-01-09 03:09:02,766 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:09:02,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2025-01-09 03:09:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:09:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367855428] [2025-01-09 03:09:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367855428] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:09:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228533119] [2025-01-09 03:09:03,009 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:09:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:09:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:09:03,013 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) [2025-01-09 03:09:03,015 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 [2025-01-09 03:09:03,037 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 92 statements into 2 equivalence classes. [2025-01-09 03:09:03,059 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 92 of 92 statements. [2025-01-09 03:09:03,060 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 03:09:03,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:03,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:09:03,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:09:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2025-01-09 03:09:03,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:09:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2025-01-09 03:09:03,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228533119] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:09:03,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:09:03,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-01-09 03:09:03,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141888654] [2025-01-09 03:09:03,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:09:03,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:09:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:09:03,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:09:03,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:09:03,227 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2025-01-09 03:09:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:09:03,303 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2025-01-09 03:09:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:09:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 92 [2025-01-09 03:09:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:09:03,305 INFO L225 Difference]: With dead ends: 141 [2025-01-09 03:09:03,305 INFO L226 Difference]: Without dead ends: 116 [2025-01-09 03:09:03,305 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:09:03,308 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:09:03,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:09:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-01-09 03:09:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2025-01-09 03:09:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.140625) internal successors, (73), 70 states have internal predecessors, (73), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2025-01-09 03:09:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2025-01-09 03:09:03,345 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 92 [2025-01-09 03:09:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:09:03,346 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2025-01-09 03:09:03,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2025-01-09 03:09:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2025-01-09 03:09:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-01-09 03:09:03,347 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:09:03,348 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:09:03,354 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 [2025-01-09 03:09:03,548 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 [2025-01-09 03:09:03,548 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:09:03,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:09:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash -95184932, now seen corresponding path program 2 times [2025-01-09 03:09:03,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:09:03,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971561897] [2025-01-09 03:09:03,549 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:09:03,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:09:03,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 96 statements into 2 equivalence classes. [2025-01-09 03:09:03,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 96 of 96 statements. [2025-01-09 03:09:03,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:09:03,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2025-01-09 03:09:03,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:09:03,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971561897] [2025-01-09 03:09:03,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971561897] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:09:03,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444303123] [2025-01-09 03:09:03,836 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:09:03,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:09:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:09:03,838 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) [2025-01-09 03:09:03,840 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 [2025-01-09 03:09:03,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 96 statements into 2 equivalence classes. [2025-01-09 03:09:03,884 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 96 of 96 statements. [2025-01-09 03:09:03,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:09:03,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:03,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-09 03:09:03,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:09:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 34 proven. 65 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-01-09 03:09:04,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:09:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 34 proven. 65 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-01-09 03:09:04,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444303123] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:09:04,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:09:04,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2025-01-09 03:09:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122325899] [2025-01-09 03:09:04,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:09:04,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 03:09:04,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:09:04,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 03:09:04,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:09:04,768 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2025-01-09 03:09:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:09:05,332 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2025-01-09 03:09:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 03:09:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 96 [2025-01-09 03:09:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:09:05,334 INFO L225 Difference]: With dead ends: 133 [2025-01-09 03:09:05,334 INFO L226 Difference]: Without dead ends: 101 [2025-01-09 03:09:05,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 03:09:05,335 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:09:05,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 348 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:09:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-01-09 03:09:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2025-01-09 03:09:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 56 states have (on average 1.125) internal successors, (63), 60 states have internal predecessors, (63), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2025-01-09 03:09:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2025-01-09 03:09:05,353 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 96 [2025-01-09 03:09:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:09:05,353 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2025-01-09 03:09:05,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2025-01-09 03:09:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2025-01-09 03:09:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-01-09 03:09:05,353 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:09:05,354 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:09:05,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 03:09:05,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:09:05,555 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:09:05,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:09:05,555 INFO L85 PathProgramCache]: Analyzing trace with hash 981301162, now seen corresponding path program 3 times [2025-01-09 03:09:05,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:09:05,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382406456] [2025-01-09 03:09:05,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:09:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:09:05,560 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 107 statements into 10 equivalence classes. [2025-01-09 03:09:05,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 91 of 107 statements. [2025-01-09 03:09:05,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-01-09 03:09:05,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 48 proven. 22 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2025-01-09 03:09:05,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:09:05,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382406456] [2025-01-09 03:09:05,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382406456] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:09:05,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933554339] [2025-01-09 03:09:05,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:09:05,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:09:05,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:09:05,736 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) [2025-01-09 03:09:05,737 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 [2025-01-09 03:09:05,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 107 statements into 10 equivalence classes. [2025-01-09 03:09:05,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 42 of 107 statements. [2025-01-09 03:09:05,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 03:09:05,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:05,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-09 03:09:05,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:09:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 148 proven. 41 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2025-01-09 03:09:05,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:09:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2025-01-09 03:09:06,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933554339] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:09:06,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:09:06,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2025-01-09 03:09:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757713299] [2025-01-09 03:09:06,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:09:06,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:09:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:09:06,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:09:06,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:09:06,057 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2025-01-09 03:09:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:09:06,809 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2025-01-09 03:09:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 03:09:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) Word has length 107 [2025-01-09 03:09:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:09:06,810 INFO L225 Difference]: With dead ends: 119 [2025-01-09 03:09:06,810 INFO L226 Difference]: Without dead ends: 111 [2025-01-09 03:09:06,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2025-01-09 03:09:06,811 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:09:06,811 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 202 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:09:06,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-01-09 03:09:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2025-01-09 03:09:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 69 states have internal predecessors, (74), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2025-01-09 03:09:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2025-01-09 03:09:06,835 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 107 [2025-01-09 03:09:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:09:06,835 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2025-01-09 03:09:06,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2025-01-09 03:09:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2025-01-09 03:09:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-01-09 03:09:06,841 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:09:06,841 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:09:06,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-09 03:09:07,041 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,SelfDestructingSolverStorable16 [2025-01-09 03:09:07,041 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:09:07,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:09:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 381927093, now seen corresponding path program 5 times [2025-01-09 03:09:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:09:07,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158715505] [2025-01-09 03:09:07,042 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:09:07,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:09:07,047 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 108 statements into 10 equivalence classes. [2025-01-09 03:09:07,098 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 108 of 108 statements. [2025-01-09 03:09:07,099 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-09 03:09:07,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:09:07,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593941644] [2025-01-09 03:09:07,100 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:09:07,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:09:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:09:07,105 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) [2025-01-09 03:09:07,119 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 [2025-01-09 03:09:07,142 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 108 statements into 10 equivalence classes. [2025-01-09 03:09:07,190 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 108 of 108 statements. [2025-01-09 03:09:07,190 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-09 03:09:07,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:09:07,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-01-09 03:09:07,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:09:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 74 proven. 52 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2025-01-09 03:09:07,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:09:52,077 WARN L286 SmtUtils]: Spent 6.83s on a formula simplification that was a NOOP. DAG size: 299 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)